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A comprehensive guide to crafting a successful comparison essay.

Comparison essays are a common assignment in academic settings, requiring students to analyze and contrast two or more subjects, concepts, or ideas. Writing a comparison essay can be challenging, but with the right approach and guidance, you can craft a compelling and informative piece of writing.

In this comprehensive guide, we will provide you with valuable tips and examples to help you master the art of comparison essay writing. Whether you’re comparing two literary works, historical events, scientific theories, or any other topics, this guide will equip you with the tools and strategies needed to create a well-structured and persuasive essay.

From choosing a suitable topic and developing a strong thesis statement to organizing your arguments and incorporating effective evidence, this guide will walk you through each step of the writing process. By following the advice and examples provided here, you’ll be able to produce a top-notch comparison essay that showcases your analytical skills and critical thinking abilities.

Understanding the Basics

Before diving into writing a comparison essay, it’s essential to understand the basics of comparison writing. A comparison essay, also known as a comparative essay, requires you to analyze two or more subjects by highlighting their similarities and differences. This type of essay aims to show how these subjects are similar or different in various aspects.

When writing a comparison essay, you should have a clear thesis statement that identifies the subjects you are comparing and the main points of comparison. It’s essential to structure your essay effectively by organizing your ideas logically. You can use different methods of organization, such as the block method or point-by-point method, to present your comparisons.

Additionally, make sure to include evidence and examples to support your comparisons. Use specific details and examples to strengthen your arguments and clarify the similarities and differences between the subjects. Lastly, remember to provide a strong conclusion that summarizes your main points and reinforces the significance of your comparison.

Choosing a Topic for Comparison Essay

When selecting a topic for your comparison essay, it’s essential to choose two subjects that have some similarities and differences to explore. You can compare two books, two movies, two historical figures, two theories, or any other pair of related subjects.

Consider selecting topics that interest you or that you are familiar with to make the writing process more engaging and manageable. Additionally, ensure that the subjects you choose are suitable for comparison and have enough material for analysis.

It’s also helpful to brainstorm ideas and create a list of potential topics before making a final decision. Once you have a few options in mind, evaluate them based on the relevance of the comparison, the availability of credible sources, and your own interest in the subjects.

Remember that a well-chosen topic is one of the keys to writing a successful comparison essay, so take your time to select subjects that will allow you to explore meaningful connections and differences in a compelling way.

Finding the Right Pairing

When writing a comparison essay, it’s crucial to find the right pairing of subjects to compare. Choose subjects that have enough similarities and differences to make a meaningful comparison. Consider the audience and purpose of your essay to determine what pairing will be most effective.

Look for subjects that you are passionate about or have a deep understanding of. This will make the writing process easier and more engaging. Additionally, consider choosing subjects that are relevant and timely, as this will make your essay more interesting to readers.

Don’t be afraid to think outside the box when finding the right pairing. Sometimes unexpected combinations can lead to the most compelling comparisons. Conduct thorough research on both subjects to ensure you have enough material to work with and present a balanced comparison.

Structuring Your Comparison Essay

When writing a comparison essay, it is essential to organize your ideas in a clear and logical manner. One effective way to structure your essay is to use a point-by-point comparison or a block comparison format.

Whichever format you choose, make sure to introduce your subjects, present your points of comparison, provide evidence or examples to support your comparisons, and conclude by summarizing the main points and highlighting the significance of your comparison.

Creating a Clear Outline

Before you start writing your comparison essay, it’s essential to create a clear outline. An outline serves as a roadmap that helps you stay organized and focused throughout the writing process. Here are some steps to create an effective outline:

1. Identify the subjects of comparison: Start by determining the two subjects you will be comparing in your essay. Make sure they have enough similarities and differences to make a meaningful comparison.

2. Brainstorm key points: Once you have chosen the subjects, brainstorm the key points you want to compare and contrast. These could include characteristics, features, themes, or arguments related to each subject.

3. Organize your points: Arrange your key points in a logical order. You can choose to compare similar points side by side or alternate between the two subjects to highlight differences.

4. Develop a thesis statement: Based on your key points, develop a clear thesis statement that states the main purpose of your comparison essay. This statement should guide the rest of your writing and provide a clear direction for your argument.

5. Create a structure: Divide your essay into introduction, body paragraphs, and conclusion. Each section should serve a specific purpose and contribute to the overall coherence of your essay.

By creating a clear outline, you can ensure that your comparison essay flows smoothly and effectively communicates your ideas to the reader.

Engaging the Reader

When writing a comparison essay, it is crucial to engage the reader right from the beginning. You want to hook their attention and make them want to keep reading. Here are some tips to engage your reader:

• Start with a strong opening statement or question that entices the reader to continue reading.
• Use vivid language and descriptive imagery to paint a clear picture in the reader’s mind.
• Provide interesting facts or statistics that pique the reader’s curiosity.
• Create a compelling thesis statement that outlines the purpose of your comparison essay.

By engaging the reader from the start, you set the stage for a successful and impactful comparison essay that keeps the reader engaged until the very end.

Point-by-Point vs Block Method

When writing a comparison essay, you have two main options for structuring your content: the point-by-point method and the block method. Each method has its own advantages and may be more suitable depending on the type of comparison you are making.

• Point-by-Point Method: This method involves discussing one point of comparison at a time between the two subjects. You will go back and forth between the subjects, highlighting similarities and differences for each point. This method allows for a more detailed and nuanced analysis of the subjects.
• Block Method: In contrast, the block method involves discussing all the points related to one subject first, followed by all the points related to the second subject. This method provides a more straightforward and organized comparison but may not delve as deeply into the individual points of comparison.

Ultimately, the choice between the point-by-point and block methods depends on the complexity of your comparison and the level of detail you want to explore. Experiment with both methods to see which one best suits your writing style and the specific requirements of your comparison essay.

Selecting the Best Approach

When it comes to writing a comparison essay, selecting the best approach is crucial to ensure a successful and effective comparison. There are several approaches you can take when comparing two subjects, including the block method and the point-by-point method.

The block method: This approach involves discussing all the similarities and differences of one subject first, followed by a thorough discussion of the second subject. This method is useful when the two subjects being compared are quite different or when the reader may not be familiar with one of the subjects.

The point-by-point method: This approach involves alternating between discussing the similarities and differences of the two subjects in each paragraph. This method allows for a more in-depth comparison of specific points and is often preferred when the two subjects have many similarities and differences.

Before selecting an approach, consider the nature of the subjects being compared and the purpose of your comparison essay. Choose the approach that will best serve your purpose and allow for a clear, organized, and engaging comparison.

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Comparing and Contrasting

What this handout is about.

This handout will help you first to determine whether a particular assignment is asking for comparison/contrast and then to generate a list of similarities and differences, decide which similarities and differences to focus on, and organize your paper so that it will be clear and effective. It will also explain how you can (and why you should) develop a thesis that goes beyond “Thing A and Thing B are similar in many ways but different in others.”

Introduction

In your career as a student, you’ll encounter many different kinds of writing assignments, each with its own requirements. One of the most common is the comparison/contrast essay, in which you focus on the ways in which certain things or ideas—usually two of them—are similar to (this is the comparison) and/or different from (this is the contrast) one another. By assigning such essays, your instructors are encouraging you to make connections between texts or ideas, engage in critical thinking, and go beyond mere description or summary to generate interesting analysis: when you reflect on similarities and differences, you gain a deeper understanding of the items you are comparing, their relationship to each other, and what is most important about them.

Recognizing comparison/contrast in assignments

Some assignments use words—like compare, contrast, similarities, and differences—that make it easy for you to see that they are asking you to compare and/or contrast. Here are a few hypothetical examples:

• Compare and contrast Frye’s and Bartky’s accounts of oppression.
• Compare WWI to WWII, identifying similarities in the causes, development, and outcomes of the wars.
• Contrast Wordsworth and Coleridge; what are the major differences in their poetry?

Notice that some topics ask only for comparison, others only for contrast, and others for both.

But it’s not always so easy to tell whether an assignment is asking you to include comparison/contrast. And in some cases, comparison/contrast is only part of the essay—you begin by comparing and/or contrasting two or more things and then use what you’ve learned to construct an argument or evaluation. Consider these examples, noticing the language that is used to ask for the comparison/contrast and whether the comparison/contrast is only one part of a larger assignment:

• Choose a particular idea or theme, such as romantic love, death, or nature, and consider how it is treated in two Romantic poems.
• How do the different authors we have studied so far define and describe oppression?
• Compare Frye’s and Bartky’s accounts of oppression. What does each imply about women’s collusion in their own oppression? Which is more accurate?
• In the texts we’ve studied, soldiers who served in different wars offer differing accounts of their experiences and feelings both during and after the fighting. What commonalities are there in these accounts? What factors do you think are responsible for their differences?

You may want to check out our handout on understanding assignments for additional tips.

Using comparison/contrast for all kinds of writing projects

Sometimes you may want to use comparison/contrast techniques in your own pre-writing work to get ideas that you can later use for an argument, even if comparison/contrast isn’t an official requirement for the paper you’re writing. For example, if you wanted to argue that Frye’s account of oppression is better than both de Beauvoir’s and Bartky’s, comparing and contrasting the main arguments of those three authors might help you construct your evaluation—even though the topic may not have asked for comparison/contrast and the lists of similarities and differences you generate may not appear anywhere in the final draft of your paper.

Discovering similarities and differences

Making a Venn diagram or a chart can help you quickly and efficiently compare and contrast two or more things or ideas. To make a Venn diagram, simply draw some overlapping circles, one circle for each item you’re considering. In the central area where they overlap, list the traits the two items have in common. Assign each one of the areas that doesn’t overlap; in those areas, you can list the traits that make the things different. Here’s a very simple example, using two pizza places:

To make a chart, figure out what criteria you want to focus on in comparing the items. Along the left side of the page, list each of the criteria. Across the top, list the names of the items. You should then have a box per item for each criterion; you can fill the boxes in and then survey what you’ve discovered.

Here’s an example, this time using three pizza places:

As you generate points of comparison, consider the purpose and content of the assignment and the focus of the class. What do you think the professor wants you to learn by doing this comparison/contrast? How does it fit with what you have been studying so far and with the other assignments in the course? Are there any clues about what to focus on in the assignment itself?

Here are some general questions about different types of things you might have to compare. These are by no means complete or definitive lists; they’re just here to give you some ideas—you can generate your own questions for these and other types of comparison. You may want to begin by using the questions reporters traditionally ask: Who? What? Where? When? Why? How? If you’re talking about objects, you might also consider general properties like size, shape, color, sound, weight, taste, texture, smell, number, duration, and location.

Two historical periods or events

• When did they occur—do you know the date(s) and duration? What happened or changed during each? Why are they significant?
• What kinds of work did people do? What kinds of relationships did they have? What did they value?
• What kinds of governments were there? Who were important people involved?
• What caused events in these periods, and what consequences did they have later on?

Two ideas or theories

• What are they about?
• Did they originate at some particular time?
• Who created them? Who uses or defends them?
• What is the central focus, claim, or goal of each? What conclusions do they offer?
• How are they applied to situations/people/things/etc.?
• Which seems more plausible to you, and why? How broad is their scope?
• What kind of evidence is usually offered for them?

Two pieces of writing or art

• What are their titles? What do they describe or depict?
• What is their tone or mood? What is their form?
• Who created them? When were they created? Why do you think they were created as they were? What themes do they address?
• Do you think one is of higher quality or greater merit than the other(s)—and if so, why?
• For writing: what plot, characterization, setting, theme, tone, and type of narration are used?
• Where are they from? How old are they? What is the gender, race, class, etc. of each?
• What, if anything, are they known for? Do they have any relationship to each other?
• What are they like? What did/do they do? What do they believe? Why are they interesting?
• What stands out most about each of them?

Deciding what to focus on

By now you have probably generated a huge list of similarities and differences—congratulations! Next you must decide which of them are interesting, important, and relevant enough to be included in your paper. Ask yourself these questions:

• What’s relevant to the assignment?
• What’s relevant to the course?
• What’s interesting and informative?
• What matters to the argument you are going to make?
• What’s basic or central (and needs to be mentioned even if obvious)?
• Overall, what’s more important—the similarities or the differences?

Suppose that you are writing a paper comparing two novels. For most literature classes, the fact that they both use Caslon type (a kind of typeface, like the fonts you may use in your writing) is not going to be relevant, nor is the fact that one of them has a few illustrations and the other has none; literature classes are more likely to focus on subjects like characterization, plot, setting, the writer’s style and intentions, language, central themes, and so forth. However, if you were writing a paper for a class on typesetting or on how illustrations are used to enhance novels, the typeface and presence or absence of illustrations might be absolutely critical to include in your final paper.

Sometimes a particular point of comparison or contrast might be relevant but not terribly revealing or interesting. For example, if you are writing a paper about Wordsworth’s “Tintern Abbey” and Coleridge’s “Frost at Midnight,” pointing out that they both have nature as a central theme is relevant (comparisons of poetry often talk about themes) but not terribly interesting; your class has probably already had many discussions about the Romantic poets’ fondness for nature. Talking about the different ways nature is depicted or the different aspects of nature that are emphasized might be more interesting and show a more sophisticated understanding of the poems.

Your thesis

The thesis of your comparison/contrast paper is very important: it can help you create a focused argument and give your reader a road map so they don’t get lost in the sea of points you are about to make. As in any paper, you will want to replace vague reports of your general topic (for example, “This paper will compare and contrast two pizza places,” or “Pepper’s and Amante are similar in some ways and different in others,” or “Pepper’s and Amante are similar in many ways, but they have one major difference”) with something more detailed and specific. For example, you might say, “Pepper’s and Amante have similar prices and ingredients, but their atmospheres and willingness to deliver set them apart.”

Be careful, though—although this thesis is fairly specific and does propose a simple argument (that atmosphere and delivery make the two pizza places different), your instructor will often be looking for a bit more analysis. In this case, the obvious question is “So what? Why should anyone care that Pepper’s and Amante are different in this way?” One might also wonder why the writer chose those two particular pizza places to compare—why not Papa John’s, Dominos, or Pizza Hut? Again, thinking about the context the class provides may help you answer such questions and make a stronger argument. Here’s a revision of the thesis mentioned earlier:

Pepper’s and Amante both offer a greater variety of ingredients than other Chapel Hill/Carrboro pizza places (and than any of the national chains), but the funky, lively atmosphere at Pepper’s makes it a better place to give visiting friends and family a taste of local culture.

You may find our handout on constructing thesis statements useful at this stage.

Organizing your paper

There are many different ways to organize a comparison/contrast essay. Here are two:

Subject-by-subject

Begin by saying everything you have to say about the first subject you are discussing, then move on and make all the points you want to make about the second subject (and after that, the third, and so on, if you’re comparing/contrasting more than two things). If the paper is short, you might be able to fit all of your points about each item into a single paragraph, but it’s more likely that you’d have several paragraphs per item. Using our pizza place comparison/contrast as an example, after the introduction, you might have a paragraph about the ingredients available at Pepper’s, a paragraph about its location, and a paragraph about its ambience. Then you’d have three similar paragraphs about Amante, followed by your conclusion.

The danger of this subject-by-subject organization is that your paper will simply be a list of points: a certain number of points (in my example, three) about one subject, then a certain number of points about another. This is usually not what college instructors are looking for in a paper—generally they want you to compare or contrast two or more things very directly, rather than just listing the traits the things have and leaving it up to the reader to reflect on how those traits are similar or different and why those similarities or differences matter. Thus, if you use the subject-by-subject form, you will probably want to have a very strong, analytical thesis and at least one body paragraph that ties all of your different points together.

A subject-by-subject structure can be a logical choice if you are writing what is sometimes called a “lens” comparison, in which you use one subject or item (which isn’t really your main topic) to better understand another item (which is). For example, you might be asked to compare a poem you’ve already covered thoroughly in class with one you are reading on your own. It might make sense to give a brief summary of your main ideas about the first poem (this would be your first subject, the “lens”), and then spend most of your paper discussing how those points are similar to or different from your ideas about the second.

Point-by-point

Rather than addressing things one subject at a time, you may wish to talk about one point of comparison at a time. There are two main ways this might play out, depending on how much you have to say about each of the things you are comparing. If you have just a little, you might, in a single paragraph, discuss how a certain point of comparison/contrast relates to all the items you are discussing. For example, I might describe, in one paragraph, what the prices are like at both Pepper’s and Amante; in the next paragraph, I might compare the ingredients available; in a third, I might contrast the atmospheres of the two restaurants.

If I had a bit more to say about the items I was comparing/contrasting, I might devote a whole paragraph to how each point relates to each item. For example, I might have a whole paragraph about the clientele at Pepper’s, followed by a whole paragraph about the clientele at Amante; then I would move on and do two more paragraphs discussing my next point of comparison/contrast—like the ingredients available at each restaurant.

There are no hard and fast rules about organizing a comparison/contrast paper, of course. Just be sure that your reader can easily tell what’s going on! Be aware, too, of the placement of your different points. If you are writing a comparison/contrast in service of an argument, keep in mind that the last point you make is the one you are leaving your reader with. For example, if I am trying to argue that Amante is better than Pepper’s, I should end with a contrast that leaves Amante sounding good, rather than with a point of comparison that I have to admit makes Pepper’s look better. If you’ve decided that the differences between the items you’re comparing/contrasting are most important, you’ll want to end with the differences—and vice versa, if the similarities seem most important to you.

Our handout on organization can help you write good topic sentences and transitions and make sure that you have a good overall structure in place for your paper.

Cue words and other tips

To help your reader keep track of where you are in the comparison/contrast, you’ll want to be sure that your transitions and topic sentences are especially strong. Your thesis should already have given the reader an idea of the points you’ll be making and the organization you’ll be using, but you can help them out with some extra cues. The following words may be helpful to you in signaling your intentions:

• like, similar to, also, unlike, similarly, in the same way, likewise, again, compared to, in contrast, in like manner, contrasted with, on the contrary, however, although, yet, even though, still, but, nevertheless, conversely, at the same time, regardless, despite, while, on the one hand … on the other hand.

For example, you might have a topic sentence like one of these:

• Compared to Pepper’s, Amante is quiet.
• Like Amante, Pepper’s offers fresh garlic as a topping.
• Despite their different locations (downtown Chapel Hill and downtown Carrboro), Pepper’s and Amante are both fairly easy to get to.

You may reproduce it for non-commercial use if you use the entire handout and attribute the source: The Writing Center, University of North Carolina at Chapel Hill

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8 Step-By-Step Guide On How To Write A Comparison Essay

Writing a comparison essay is a difficult task for many students because it requires a lot of effort and plan. Students have to write in-depth details about the topic they are comparing. 

A comparison essay is a type of academic writing in which students analyze the differences and similarities between two topics. The introduction is the first step in writing a comparison essay. 

Weather they are comparing historical events, literature, a well-written comparison essay will provide insights into the relationships between the topics or concepts they are analyzing. 

It should grab the reader’s attention, provide background information on the topic, and present a thesis statement that clearly states what you will be comparing and contrasting.

But many students are not able to write a comparison essay because they don’t know how to write. That’s why we have created this blog to provide best steps on how to write a comparison essay.

If you want to compare two topics effectively, then you have to follow the right steps. Here we have provide the best steps that will help you with this. So let’s get started. 

What Is Comparison Essay?

Table of Contents

A comparison essay (also known as a Compare and Contrast essay) is a typical writing assignment in high school and college classrooms ranging from art to science. You should critically study any two subjects in a comparison essay, locating and pointing out their parallels and differences.

Such essays might be comparative only (looking at similarities), contrasting only (calling out contrasts), or both comparative and contrasting, depending on your assignment.

What Makes A Good Comparison Essay Topic?

Many students don’t know how to write a comparison essay. What you exactly write in your paper can decide the success or failure of your essay. Like any other academic work, a good comparison and contrast essay will have a purpose that offers value. Consider subjects that are relevant to the field of study. Effective comparison and contrast subjects should expand the scope of knowledge or provide evidence for valid statements that have yet to be proven. The following are a few examples of possible topics:

• Economics : Fiscal vs. Monetary Policy – An study of the Great Depression and the Stagflation Era
• Political Science: Barack Obama vs. George W. Bush: Inspiring orator vs. modest disposition
• Literature: Faulkner and Hemingway: A Prose Paradox
• Philosophy: Utilitarianism and Existentialism
• Law: When it comes to property, Common Law vs. Statute Law

When you start college, you may be assigned to create a decent application comparison essay in addition to these academic areas. These subjects could be lighter, such as comparing your youth to your adolescent years or contrasting two close friends.

Comparison Essay Structure

One of the most critical aspects of success is to think about the structure of your essay. The only way to properly outline and compose an essay, paragraph by paragraph, from beginning to end, without errors, is to follow a recommended essay structure.

There are 2 recommended patterns for a comparison essay: the point-by-point (“alternating”) pattern and the subject-by-subject (or “block”) pattern.

Alternating Pattern

“Point-by-point comparison” is another name for the alternating pattern. Your essay will have five paragraphs if you use this style of comparison. 

You’ll have to compare and contrast each of the similarities and differences in the following subjects to complete it:

• Your thesis is stated in the introduction.
• Then, for each point of comparison and contrast, you explain both of your topics together.
• You repeat the thesis and briefly summarise your essay in conclusion.

Block Pattern

“Subject-by-subject comparison” is another name for the block pattern. The body of your compare and contrast essay will be divided into two parts according to this structure.

The first half of the body will be devoted to the first subject, while the second half will be focused on the second:

• You start with the first topic.
• Then you move on to the second topic.

How To Write a comparison essay and Compare Essay?

Here we will tell you how to write a comparison essay. A proper essay outline and organizational framework are required for comparing and contrasting essays.

When writing a decent compare and contrast essay, keep the following ideas in mind.

Selecting the Objects

The selection of the objects to compare is the first stage, and they should be distinct but belong to the same category. Instead of reaching an artist to a politician, a writer could compare two separate artists. This is the first step on how to write a comparison essay.

Identify the Differences and Similarities  

In the second phase, a writer must pinpoint the Differences and Similarities. This approach is generally aided by drawing a Venn diagram with two overlapping circles, and it helps with the organization of data. This is the second step on how to write a comparison essay.

Create a Thesis Statement

The goal of this essay is to use similarities and contrasts to create a thesis statement. The thesis statement aids in the development of a focused argument and the creation of a road map for the reader. Determine what your essay will say about the topics. This is the third step on how to write a comparison essay.

Select an Appropriate Organizational Structure

It’s critical to pick a framework that makes sense for your core point. Choose one of the appropriate structures from the list above and write your essay appropriately. By following a strict format, the entire essay will remain on track. This is the fourth step on how to write a comparison essay.

Craft an Outline

Create an outline for your essay based on your organizational structure. An article typically includes an introduction, three body paragraphs, and a conclusion. If you have a lot of information to cover, you can always increase body paragraphs.

You can explore the similarities and contrasts in a single paragraph if you use a point-by-point structure. If you use the block structure format, each subject gets its paragraph. This is the fifth step on how to write a comparison essay.

Provide evidence to back up your thesis statement

Support your argument with extra evidence. Evidence can be gathered by extensive research, reading, or firsthand observation. When comparing two types of cats, for example, it is acceptable to utilize personal thoughts. In this approach, your argument will make a great impression on the reader’s mind. This is the sixth step on how to write a comparison essay.

Use Strong Transition Words

To ensure a smooth transition from one statement to the following, powerful transitional words should be used. When comparing, use words like both, likewise, and similarly.  This is the seventh step on how to write a comparison essay.

Proofread Carefully

Do not read your article right after you finish it. Proofread for at least an hour or a day. It helps in the detection of more grammatical and spelling errors.

You can also use an online spell-check tool to help you. Additionally, have someone else read your article and point out any flaws. This is the eighth step on how to write a comparison essay.

How to Begin a Comparison Essay

In a comparison essay, you should assess two subjects and bring out their similarities so that the reader may create an informed opinion about them.

The manner you begin a comparison essay has a significant impact on your readers. It is critical to remember that the nature of your introduction impacts whether or not your readers will become interested in your article or abandon it.

As a result, here’s a rundown of some of the techniques you might use to grab your audience’s interest.

• Give your readers a brief history of your issue to assist them in grasping it.
• Begin with a narrative to attract the reader to learn more about your topic.
• Make a terrific remark, either happy or shocking.
• Use statistics to show the scope of the problem.

Comparison Essay Outline Example

An outline is helpful for organizing your thoughts and ideas before you begin writing your comparison essay. Here is an example of an outline for a comparison essay:

Introduction

• Background information on the topic
• Brief overview of the items or concepts to be compared and contrasted
• Thesis statement that clearly states what will be compared and contrasted

Body Paragraphs

• Compare and contrast point 1
• Evidence and examples for topic or concept 1
• Evidence and examples for topic or concept 2
• Analysis of how point 1 relates to the overall comparison and contrast
• Compare and contrast point 2
• Analysis of how point 2 relates to the overall comparison and contrast
• Compare and contrast point 3
• Analysis of how point 3 relates to the overall comparison and contrast
• Summary of main points
• Restatement of thesis
• Final thoughts and insights on the comparison and contrast

This is a basic outline example and you can modify it according to your requirements and the specific demands of the essay. The important thing is to have a clear structure that allows you to present your comparison and contrast points in a logical and organized way.

In this blog, you have learned about how to write a comparison essay. I hope you have understood how to write a comparison essay easily. A comparison and contrast essay is critical for assisting readers in making educated selections when deciding between two objects or situations. To determine what to choose, a reader must first read the article, consider its various elements, and then settle in favor of one. Contact us for Top Quality Essay Writing Help if you don’t know how to write a comparison essay and contrast essay. how to write a comparison essay

FAQs (Frequently Asked Questions)

In compare and contrast essays, what are the most regularly utilized transition words.

The following are the most typical compare and contrast essay transition words: In the same way In like manner Likewise Similarly By the same token

What does a compare and contrast essay serve?

The main goal of a compare and contrast essay is to show how two items are alike and dissimilar, and they also necessitate the application of critical thinking skills. A good comparison essay can teach readers about current events, political candidates, vacation places, and items.

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The Comparative Essay

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What is a comparative essay?

A comparative essay asks that you compare at least two (possibly more) items. These items will differ depending on the assignment. You might be asked to compare

• positions on an issue (e.g., responses to midwifery in Canada and the United States)
• theories (e.g., capitalism and communism)
• figures (e.g., GDP in the United States and Britain)
• texts (e.g., Shakespeare’s Hamlet and Macbeth )
• events (e.g., the Great Depression and the global financial crisis of 2008–9)

Although the assignment may say “compare,” the assumption is that you will consider both the similarities and differences; in other words, you will compare and contrast.

Make sure you know the basis for comparison

The assignment sheet may say exactly what you need to compare, or it may ask you to come up with a basis for comparison yourself.

• Provided by the essay question: The essay question may ask that you consider the figure of the gentleman in Charles Dickens’s Great Expectations and Anne Brontë’s The Tenant of Wildfell Hall . The basis for comparison will be the figure of the gentleman.
• Developed by you: The question may simply ask that you compare the two novels. If so, you will need to develop a basis for comparison, that is, a theme, concern, or device common to both works from which you can draw similarities and differences.

Develop a list of similarities and differences

Once you know your basis for comparison, think critically about the similarities and differences between the items you are comparing, and compile a list of them.

For example, you might decide that in Great Expectations , being a true gentleman is not a matter of manners or position but morality, whereas in The Tenant of Wildfell Hall , being a true gentleman is not about luxury and self-indulgence but hard work and productivity.

The list you have generated is not yet your outline for the essay, but it should provide you with enough similarities and differences to construct an initial plan.

Develop a thesis based on the relative weight of similarities and differences

Once you have listed similarities and differences, decide whether the similarities on the whole outweigh the differences or vice versa. Create a thesis statement that reflects their relative weights. A more complex thesis will usually include both similarities and differences. Here are examples of the two main cases:

While Callaghan’s “All the Years of Her Life” and Mistry’s “Of White Hairs and Cricket” both follow the conventions of the coming-of-age narrative, Callaghan’s story adheres more closely to these conventions by allowing its central protagonist to mature. In Mistry’s story, by contrast, no real growth occurs.

Although Darwin and Lamarck came to different conclusions about whether acquired traits can be inherited, they shared the key distinction of recognizing that species evolve over time.

Come up with a structure for your essay

Note that the French and Russian revolutions (A and B) may be dissimilar rather than similar in the way they affected innovation in any of the three areas of technology, military strategy, and administration. To use the alternating method, you just need to have something noteworthy to say about both A and B in each area. Finally, you may certainly include more than three pairs of alternating points: allow the subject matter to determine the number of points you choose to develop in the body of your essay.

When do I use the block method? The block method is particularly useful in the following cases:

• You are unable to find points about A and B that are closely related to each other.
• Your ideas about B build upon or extend your ideas about A.
• You are comparing three or more subjects as opposed to the traditional two.

How to Write a Comparison Essay

• Introduction
• Essay Outline
• Expressions For Comparison Essays
• Sample Comparison 1
• Sample Comparison 2
• Guides & Handouts Home
• Writing Centre Home

A comparison essay compares and contrasts two things. That is, it points out the similarities and differences (mostly focusing on the differences) of those two things. The two things usually belong to the same class (ex. two cities, two politicians, two sports, etc.). Relatively equal attention is given to the two subjects being compared. The essay may treat the two things objectively and impartially. Or it may be partial, favoring one thing over the other (ex. "American football is a sissy's game compared to rugby").

The important thing in any comparison essay is that the criteria for comparison should remain the same; that is,  the same attributes should be compared . For example, if you are comparing an electric bulb lamp with a gas lamp, compare them both according to their physical characteristics, their history of development, and their operation.

Narrow Your Focus (in this essay, as in any essay). For example, if you compare two religions, focus on  one  particular aspect which you can discuss in depth and detail, e.g., sin in Buddhism vs. sin in Christianity, or salvation in two religions. Or if your topic is political, you might compare the Conservative attitude to old growth logging vs. the Green Party's attitude to old growth logging, or the Conservative attitude to the Persian Gulf War vs. the NDP attitude to the same war.

Each paragraph should deal with only  one idea  and deal with it  thoroughly . Give  adequate explanation  and  specific examples  to support each idea. The first paragraph introduces the topic, captures the reader's attention, and provides a definite summary of the essay. It may be wise to end the first paragraph with a thesis statement that summarizes the main points of difference (or similarity). For example, "Submarines and warships differ not only in construction, but in their style of weapons and method of attack." This gives the reader a brief outline of your essay, allowing him to anticipate what's to come. Each middle paragraph should begin with a topic sentence that summarizes the main idea of that paragraph (ex. "The musical styles of Van Halen and Steely Dan are as differing in texture as are broken glass and clear water"). An opening sentence like this that uses a  metaphor  or  simile  not only summarizes the paragraph but captures the reader's attention, making him want to read on. Avoid a topic sentence that is too dull and too broad (ex. "There are many differences in the musical styles of Van Halen and Steely Dan").

VARY THE STRUCTURE

The  structure  of the comparison essay may vary. You may use  simultaneous comparison structure  in which the two things are compared together, feature by feature, point by point. For example, "The electric light bulb lasts 80 hours, while the gas lamp lasts only 20 hours . . . ." Or as in this example (comparing two American presidents):

Consider how perfectly Harding met the requirements for president. Wilson was a visionary who liked to identify himself with "forward-looking men"; Harding was as old-fashioned as those wooden Indians which used to stand in front of cigar stores, "a flower of the period before safety razors." Harding believed that statemanship had come to its apogee in the days of McKinley and Foraker. Wilson was cold. Harding was an affable small-town man, at ease with "folks"; he was an ideal companion to play poker with all Saturday night. Wilson had always been difficult of access; Harding was accessible to the last degree. etc.

Don't use simultaneous structure all the way through the essay, however. It becomes monotonous. Use it sparingly. For most of the essay, use  parallel order structure .

In  parallel order structure  you compare the two things separately but take up the same points in the same order. For example, you may spend half a paragraph on "thing A" and the other half of the paragraph on the corresponding characteristics of "thing B." Or, if you have enough material, devote one paragraph to the physical characteristics of an electric bulb lamp, and the next paragraph to the physical characteristics of the gas lamp.

Or say everything there is to say about the electric bulb lamp (its physical characteristics, history of development and operation), followed by everything there is to say about the gas lamp.

For the sake of variety  you may switch to simultaneous comparison at one point  in the essay, and then switch back to parallel order structure for the rest of the essay. In fact, there are many ways to structure a comparison essay; use whichever organization works best for your particular paper. Here are a few sample organizational methods. "A" stands for "thing A" (ex. electric lamp) and "B" stands for "thing B" (ex. gas lamp). Each number (1,2,3, etc.) stands for a different aspect of that thing (ex. physical characteristics, operation, history of development).

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Tips for Writing a Compare and Contrast Essay

• 5-minute read
• 19th August 2022

Compare and contrast essays are a specific form of academic essay with unique requirements, so if you’re a student , it’s important that you to know how to write one. Luckily, we’ve pieced together this guide to help you plan, structure, and put together your essay, complete with tips for comparing and contrasting.

Let’s begin.

1. What Is a Compare and Contrast Essay?

As you may have guessed, when writing a compare and contrast essay, you’ll need to do two things:

• Compare the similarities between two or more given subjects.
• Contrast their differences.

Compare and contrast essays are a common essay style because they allow your teacher or lecturer to assess your understanding of two theories, research methods, literary techniques, or other subjects. These subjects are usually related and may sometimes be confused with one another or are in conflict with each other.

By comparing and contrasting the subjects, you can also improve your analysis skills .

Some examples of compare and contrast essay titles include:

Compare and contrast a Shakespearean sonnet with a Petrarchan sonnet. What are the similarities and differences between anabolic and catabolic reactions? How were Nehru’s political beliefs similar to Gandhi’s? How did they differ?

2. Planning a Compare and Contrast Essay

As with any essay, before you begin writing, you should have a plan . In this case, you’ll first need to identify the similarities and differences between your subjects.

You can do this by writing out a list of all the qualities each subject possesses. Then, you can pick out any similar qualities that show up in both lists, and any qualities that are unique to just one of them. If you’re a visual learner, you might want to draw this as a Venn diagram .

Once you have all the similarities and differences prepared, consider which of them will be the most useful to include in your essay. Ask yourself:

• How much can you write about each point?
• What will your conclusion be, and which points support it?
• How will each point fit into your essay’s structure?

To answer that last question, let’s take a look at some ways to structure your essay.

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3. Structuring a Compare and Contrast Essay

Now that you’ve got a plan for your essay, it’s time to organize it. There are three main structures you can follow when writing a compare and contrast essay: 

• The block structure: All of the information about one subject (e.g., Shakespearean sonnets) is presented in the first few paragraphs, followed by the subject it’s being compared and contrasted with (e.g., Petrarchan sonnets).
• The alternating structure: One similarity or difference between both subjects (e.g., rhyme scheme) is explored in one paragraph, followed by a paragraph on another similarity or difference (e.g., use of imagery), and so on.
• The similarities and differences structure: All the similarities between both subjects are presented, followed by the differences.

There are benefits to each of these structures. The block structure, for example, can be easier to write, while the alternating structure presents each similarity and difference clearly, and the similarities and differences structure focuses on those points rather than the subjects themselves. 

So, when deciding which structure to use, consider what would work best for your essay. If you intend to cover each subject in detail, for example, you might want to choose the block structure. 

On the other hand, if you want to emphasize the connections between each subject, the alternating structure might be best. 

Finally, if you want to conclude that the subjects are either overwhelmingly similar or different to each other, the similarities and differences structure may work in your favor.

Whichever structure you follow, though, you’ll need to include a strong introduction and conclusion.

Your introduction should:

• Establish the subjects you will be comparing and contrasting.
• Provide some background about their connection (e.g., “Shakespearean and Petrarchan sonnets are poetic forms common in the 14th to 19th centuries”).
• Explain what you aim to achieve with your essay.

Meanwhile, your conclusion should:

• Summarize the main similarities and differences you have identified.
• Make a point regarding the relationship between your subjects.

4. Things to Remember

Here are some important tips to keep in mind when writing your compare and contrast essay:

• Ensure you are comparing or contrasting the same criteria between each subject. For example, it wouldn’t make sense to compare the line length of a Shakespearean sonnet with the rhyme scheme of a Petrarchan sonnet, as these are two separate categories.
• Always address both subjects of your essay in any introductions, conclusions, and topic sentences.
• Use comparison words and phrases such as “similarly,” “like,” and “in the same way” when comparing subjects.
• Use contrast words and phrases such as “in contrast,” “however,” and “whereas” when contrasting subjects.
• As with any essay, make sure to back up any arguments you make with evidence and credible sources .

Expert Academic Proofreading

Once you’ve written your compare and contrast essay, don’t forget to have it proofread. Our dedicated essay editing team is available 24/7 to help polish your paper. Try us out with a free proofreading and editing sample .

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Writing a Paper: Comparing & Contrasting

A compare and contrast paper discusses the similarities and differences between two or more topics. The paper should contain an introduction with a thesis statement, a body where the comparisons and contrasts are discussed, and a conclusion.

Address Both Similarities and Differences

Because this is a compare and contrast paper, both the similarities and differences should be discussed. This will require analysis on your part, as some topics will appear to be quite similar, and you will have to work to find the differing elements.

Make Sure You Have a Clear Thesis Statement

Just like any other essay, a compare and contrast essay needs a thesis statement. The thesis statement should not only tell your reader what you will do, but it should also address the purpose and importance of comparing and contrasting the material.

Use Clear Transitions

Transitions are important in compare and contrast essays, where you will be moving frequently between different topics or perspectives.

• Examples of transitions and phrases for comparisons: as well, similar to, consistent with, likewise, too
• Examples of transitions and phrases for contrasts: on the other hand, however, although, differs, conversely, rather than.

For more information, check out our transitions page.

Structure Your Paper

Consider how you will present the information. You could present all of the similarities first and then present all of the differences. Or you could go point by point and show the similarity and difference of one point, then the similarity and difference for another point, and so on.

Include Analysis

It is tempting to just provide summary for this type of paper, but analysis will show the importance of the comparisons and contrasts. For instance, if you are comparing two articles on the topic of the nursing shortage, help us understand what this will achieve. Did you find consensus between the articles that will support a certain action step for people in the field? Did you find discrepancies between the two that point to the need for further investigation?

Make Analogous Comparisons

When drawing comparisons or making contrasts, be sure you are dealing with similar aspects of each item. To use an old cliché, are you comparing apples to apples?

• Example of poor comparisons: Kubista studied the effects of a later start time on high school students, but Cook used a mixed methods approach. (This example does not compare similar items. It is not a clear contrast because the sentence does not discuss the same element of the articles. It is like comparing apples to oranges.)
• Example of analogous comparisons: Cook used a mixed methods approach, whereas Kubista used only quantitative methods. (Here, methods are clearly being compared, allowing the reader to understand the distinction.

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Comparing and Contrasting: A Guide to Improve Your Essays

Walter Akolo

Essays that require you to compare and contrast two or more subjects, ideas, places, or items are common.

They call for you to highlight the key similarities (compare) and differences (contrast) between them.

This guide contains all the information you need to become better at writing comparing and contrasting essays.

This includes: how to structure your essay, how to decide on the content, and some examples of essay questions.

Let’s dive in.

What Is Comparing and Contrasting?

Is compare and contrast the same as similarities and differences, what is the purpose of comparing and contrasting, can you compare and contrast any two items, how do you compare and contrast in writing, what are some comparing and contrasting techniques, how do you compare and contrast in college level writing, the four essentials of compare and contrast essays, what can you learn from a compare and contrast essay.

At their most basic, both comparing and contrasting base their evaluation on two or more subjects that share a connection.

The subjects could have similar characteristics, features, or foundations.

But while a comparison discusses the similarities of the two subjects, e.g. a banana and a watermelon are both fruit, contrasting highlights how the subjects or items differ from each other, e.g. a watermelon is around 10 times larger than a banana.

Any question that you are asked in education will have a variety of interesting comparisons and deductions that you can make.

Compare is the same as similarities.

Contrast is the same as differences.

This is because comparing identifies the likeness between two subjects, items, or categories, while contrasting recognizes disparities between them.

When you compare things, you represent them regarding their similarity, but when you contrast things, you define them in reference to their differences.

As a result, if you are asked to discuss the similarities and differences between two subjects, you can take an identical approach to if you are writing a compare and contrast essay.

In writing, the purpose of comparing and contrasting is to highlight subtle but important differences or similarities that might not be immediately obvious.

By illustrating the differences between elements in a similar category, you help heighten readers’ understanding of the subject or topic of discussion.

For instance, you might choose to compare and contrast red wine and white wine by pointing out the subtle differences. One of these differences is that red wine is best served at room temperature while white is best served chilled.

Also, comparing and contrasting helps to make abstract ideas more definite and minimizes the confusion that might exist between two related concepts.

Can Comparing and Contrasting Be Useful Outside of Academia?

Comparing enables you to see the pros and cons, allowing you to have a better understanding of the things under discussion. In an essay, this helps you demonstrate that you understand the nuances of your topic enough to draw meaningful conclusions from them.

Let's use a real-word example to see the benefits. Imagine you're contrasting two dresses you could buy. You might think:

• Dress A is purple, my favorite color, but it has a difficult zip and is practically impossible to match a jacket to.
• Dress B is more expensive but I already have a suitable pair of shoes and jacket and it is easier to move in.

You're linking the qualities of each dress to the context of the decision you're making. This is the same for your essay. Your comparison and contrast points will be in relation to the question you need to answer.

Comparing and contrasting is only a useful technique when applied to two related concepts.

To effectively compare two or more things, they must feature characteristics similar enough to warrant comparison.

In addition to this they must also feature a similarity that generates an interesting discussion. But what do I mean by “interesting” here?

Let’s look at two concepts, the Magna Carta and my third grade poetry competition entry.

They are both text, written on paper by a person so they fulfil the first requirement, they have a similarity. But this comparison clearly would not fulfil the second requirement, you would not be able to draw any interesting conclusions.

However, if we compare the Magna Carta to the Bill of Rights, you would be able to come to some very interesting conclusions concerning the history of world politics.

To write a good compare and contrast essay, it’s best to pick two or more topics that share a meaningful connection .

The aim of the essay would be to show the subtle differences or unforeseen similarities.

By highlighting the distinctions between elements in a similar category you can increase your readers’ understanding.

Alternatively, you could choose to focus on a comparison between two subjects that initially appear unrelated.

The more dissimilar they seem, the more interesting the comparison essay will turn out.

For instance, you could compare and contrast professional rugby players with marathon runners.

Can You Compare and Contrast in an Essay That Does Not Specifically Require It?

As a writer, you can employ comparing and contrasting techniques in your writing, particularly when looking for ideas you can later apply in your argument.

You can do this even when the comparison or contrast is not a requirement for the topic or argument you are presenting. Doing so could enable you to build your evaluation and develop a stronger argument.

Note that the similarities and differences you come up with might not even show up in the final draft.

While the use of compare and contrast can be neutral, you can also use it to highlight one option under discussion. When used this way, you can influence the perceived advantages of your preferred option.

As a writing style, comparing and contrasting can encompass an entire essay. However, it could also appear in some select paragraphs within the essay, where making some comparisons serves to better illustrate a point.

What Should You Do First?

Before you compare two things, always start by deciding on the reason for your comparison, then outline the criteria you will use to compare them.

Words and phrases commonly used for comparison include:

In writing, these words and phrases are called transitions . They help readers to understand or make the connection between sentences, paragraphs, and ideas.

Without transition words writing can feel clumsy and disjointed making it difficult to read. ProWritingAid’s transition report highlights all of a documents transitions and suggests that 25% of any sentences in a piece include a transition.

Sign up for a free ProWritingAid account to use the Transitions Report.

So, how do you form all of this into a coherent essay? It's a good idea to plan first, then decide what your paragraph layout will look like.

Venn diagrams are useful tool to start generating ideas. The, for your essay, you need to choose between going idea by idea and going point by point.

Using a Venn Diagram

A Venn diagram helps you to clearly see the similarities and differences between multiple objects, things, or subjects.

The writing tool comprises two, or more, simple, overlapping circles in which you list down the things that are alike (within the overlapping area) and those that differ (outside the overlapping area).

It’s great for brainstorming ideas and for creating your essay’s outline. You could even use it in an exam setting because it is quick and simple.

Going Subject by Subject

Going subject by subject is a structural choice for your essay.

Start by saying all you have to say on the first subject, then proceed to do the same about the second subject.

Depending on the length of your essay, you can fit the points about each subject into one paragraph or have several sections per each subject, ending with a conclusion.

This method is best for short essays on simple topics. Most university-level essays will go point by point instead.

Going Point by Point

Going point by point, or alternating, is the opposite essay structure from going subject by subject. This is ideal when you want to do more direct comparing and contrasting. It entails discussing one comparison point at a time. It allows you to use a paragraph to talk about how a certain comparing/contrasting point relates to the subjects or items you are discussing.

Alternatively, if you have lots of details about the subject, you might decide to use a paragraph for each point.

An academic compare and contrast essay looks at two or more subjects, ideas, people, or objects, compares their likeness, and contrasts their differences.

It’s an informative essay that provides insights on what is similar and different between the two items.

Depending on the essay’s instructions, you can focus solely on comparing or contrasting, or a combination of the two.

Examples of College Level Compare and Contrast Essay Questions

Here are eleven examples of compare and contrast essay questions that you might encounter at university:

• Archaeology: Compare and contrast the skulls of homo habilis, homo erectus, and homo sapiens.
• Art: Compare and contrast the working styles of any two Neoclassic artists.
• Astrophysics: Compare and contrast the chemical composition of Venus and Neptune.
• Biology: Compare and contrast the theories of Lamarck and Darwin.
• Business: Compare and contrast 2 or more business models within the agricultural industry.
• Creative writing: Compare and contrast free indirect discourse with epistolary styles.
• English Literature: Compare and contrast William Wordsworth with Robert Browning.
• Geography: Compare and contrast the benefit of solar panels with the benefit of wind turbines.
• History: Compare and contrast WWI to WWII with specific reference to the causes and outcomes.
• Medicine: Compare and contrast England’s health service with America’s health service.
• Psychology: Compare and contrast the behaviorist theory with the psychodynamic theory.

So, the key takeaways to keep in mind are:

Have a basis for comparison. The two things need to have enough in common to justify a discussion about their similarities and disparities.

Don’t go back and forth when using the block method. The best way to write your essay is to begin with a paragraph discussing all the facets of the first topic. Then, move on to another paragraph and talk through all the aspects of the second subject.

You can use both alternating and blocking techniques. Combining the two approaches is also an option. You can apply the alternating method in some paragraphs, then switch and use the block method. This method will help you offer a much deeper analysis of the subjects.

Have a reason for comparing the two things. Only select the points of comparison that resonate with your purpose.

Comparing and contrasting are essential analytical skills in academic writing. When your professor issues you with such an essay, their primary goal is to teach you how to:

• Engage in critical thinking
• See and make connections between words or ideas
• Move beyond mere descriptions or summaries to developing interesting analysis
• Get a deeper understanding of the subjects or items under comparison, their key features, and their interrelationships with each other.

Ultimately, your essay should enlighten readers by providing useful information.

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Walter Akolo is a freelance writer, internet marketer, trainer, and blogger for hire. He loves helping businesses increase their reach and conversion through excellent and engaging content. He has gotten millions of pageviews on his blog, FreelancerKenya, where he mentors writers. Check out his website walterakolo.com.

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How to Write a Comparison Essay From Start to Finish

Ah, how well I remember the panicked days of frantically googling  “How to write a comparison essay?” and "what is a comparative essay"??" and even in my darkest moments, “what is an essay????”

Also called a comparative essay or a contrast essay , this type of essay is a kind of academic writing where you, the author, analyze any similarity or difference between two subjects. 

These can be ideas, people, events, books, concepts, or other pretty much anything. The main point purpose of a compare and contrast essay is to shed light on the subjects and provide clarity on their relative characteristics.

Usually, you get assigned these as a student, or as a college essay assignment. But sometimes you have a professional writing reason to write them: perhaps writing research paper, maybe as a reviewer or a critic, or if you're a journalist or an academic. It's also a common essay prompt in exams. 

They are actually one of my favorite types of essay writing because they involve a lot of research and giving opinions– which I adore doing.

Let's dive into exactly how to write one of these essays, step by step. For the sake of illustration, I'll be using the essay topic of contrasting and comparing my two cats, Astrid and Chumbo, as an example. 

How sweet are these two!

Step Zero: Laying the groundwork: Pick two topics

(You can skip this if you already have topics selected.)

Part of the fun of any good research paper is selecting what you're going to compare and contrast. These are your main two goals:

Stay on target 

Make sure you're not trying to compare apples to oranges. 

The subjects you choose to compare should be relevant to the context or purpose of your essay. If you're writing for a literature class, pick two novels, or two characters. If you're in biology class, pick two separate evolutionary theories or two famous researchers. 

Your subjects don't have to be identical, but they should have enough in common to warrant a comparison – hence the essay. For instance, comparing two different genres of music can be insightful, but comparing music to a type of food might be too disparate unless you have a very specific and unique angle in mind.

Tip: I find it useful to outline my essay before I start my writing process, just to make sure I'll have enough to compare and contrast on. If you're hesitating, go ahead and follow the steps in an essay outline format, rather than writing the whole thing.

If you're really struggling, you can use a Venn diagram to visually understand the difference and similarities between your topics before writing anything. 

Step One: Begin at the beginning

Every essay needs an introduction, and a compare and contrast essay is no different. Your comparative essay introduction should include:

An introduction of each topic. Briefly explain to your reader what each topic is. 

A thesis statement . This is where you'll spoil the ending and explain which of the two topics you prefer best, and why, or explain why you're comparing or contrasting the two topics. 

For example, my essay introduction could be something like:

“Since getting my two cats, Astrid and Chumbo, people have often asked me which my favorite is. Astrid is smaller, more cuddly, but also more anxious. Conversely, Chumbo is large and in charge – but not as affectionate.  In this essay, I'll compare and contrast the two cats.” 

The first sentence is my thesis statement, and the next statement shows a brief intro of each topic for my contrast essay.

Writing a good thesis statement

Your main goals: be clear, tell your readers what they should take away from all your research, and be the heart of your essay.

Here are some examples:

Both Darwin's theory of evolution and Lamarck's theory of evolution provide insights into the development of species, but they differ fundamentally in their explanations of trait inheritance.

While both '1984' by George Orwell and 'Brave New World' by Aldous Huxley depict dystopian futures, they differ significantly in their portrayal of individual freedom and the means of societal control.

You can see that these are specific, direct, and let you build on these to draft your contrast essay to completion.

Step Two: Research time.

I remember when I first wrote my very first contrast essay. We were assigned to write a comparison between sea and tree octopodi.

Hilariously, if you google Tree Octopus, you do get a hit. But it's all fake information, created to help teach students not to rely on everything they read on Google (or ChatGPT, more probably in these days). 

For your important textual evidence – AKA the specific details, quotes, facts, or information from a text (like a book, article, or document) that you use to support the details in your essay – you want something a little more reliable. 

Where will you find the information you need for this contrast essay? Here are my three tips to stay sharp and make sure you're only writing based on real, trustworthy info:

Start with Scholarly Databases: Platforms like Google Scholar, JSTOR, or PubMed have loads of academic papers and articles. 

Use Libraries: Physical and online libraries have curated collections of books, journals, and more. Librarians are also an excellent resource to ask for help or direction.

Evaluate Online Sources: Not all online sources are created equal (as we've seen). Check the author's credentials, the publication date, and the reputation of the website or publication. 

Step Three: Pick your poison. 

Luckily for you, there are two pretty widely accepted methods of writing a comparative essay: the Block Method and the Point-by-Point Method. 

Block Method

With this method of writing, each of your two topics gets its own contrasting section, or block. You'll first write a sentence introducing your two topics, like, “In this essay, I will compare and contrast Astrid and Chumbo.” 

This is known as your topic sentence .

Then, dig into Topic A, detail by detail, each housed in a body paragraph. After that, you'll explore your second subject, by the same points, paragraph by paragraph. 

For example, my contrast essay could compare Astrid and Chumbo like this:

Topic A: Astrid.

Physical appearance: slender, long, orange and white fur, pink nose

Personality: nervous, goblin-like, cuddly

Likes and dislikes: Loves tuna, cuddles. Hates being alone, dogs.

Topic B: Chumbo

Physical appearance: chunky, floofy, big

Personality: friendly, clownish.

Likes and dislikes: Loves chicken, going outside. Hates rain.

You can see how I contrast the two topics by section.

By contrast, a point-by-point essay is structured by individual points, rather than topic. Each paragraph should cover one argument for both topics.

For example, in my hypothetical Astrid vs Chumbo compare and contrast essay, I might structure it like this: 

Item A: Physical appearance

Astrid: slender, long, orange and white fur, pink nose

Chumbo: chunky, floofy, big

Item B: Personality…

And so on for each point. This allows you to highlight each similarity and difference, even very subtle differences, to better effect.

When should you use each type of essay structure?

Each essay type has its place, though I prefer the PbP method almost always for an entire essay, and only use the Block Method if I'm including a section on differences inside a difference kind of essay, such as a reflective essay or a narrative essay. For lengthy essays, the PbP is clearest.

P-b-p method:

Use this one for deeper, more detailed essays where you don't want your reader losing track of where they are in a longer paragraph.

Here's a contrast essay example that uses this method on Netflix vs Hulu. 

Block method: 

By comparison, use this one when you want to compare things on a more casual level, or if you're only writing a short section to contrast two topics. 

Here's a contrast essay that uses the block method, looking at the difference between certain drugs.

Step Four: The comparison or contrast touches

One of the criterion of writing that distinguishes this essay from other kinds are the transitional words used throughout.

Here's a list of some of the best transition words to use:

Comparison Transition Words:

in comparison

in the same way

equivalently

in a similar manner

"Astrid is a very loyal cat, in that she never leaves my side. Comparably , Chumbo is not as physically snuggly, but he will almost always be in the same room as me."

Contrast Transition Words :

in contrast

on the contrary

on the other hand

“In terms of size, Chumbo is a hefty 22.4 pounds, whereas Astrid is a daintier 12.3 pounds.”

Step Five: Bring it home.

Last but not least, you'll want to write a comparative essay conclusion repeating either your learned opinion on the better of the two, or explaining what the reader should take away.

Normally, writers find it easiest to simply reword their thesis statement, highlight some of the most compelling reasons why, and call it a day.  

“In conclusion, Astrid and Chumbo are both superb cats, each with their own merits. Astrid is snugglier and more affectionate, while Chumbo is the more handsome of the two, and has a goofier personality.” 

There should not be any new information in the conclusion. 

And you're done! You've written your essay like an absolute champ. Hand it in and congratulate yourself on a job very well done. 

FAQ Section

Still have questions? Here's the FAQ section.

How long should a comparison essay be?

As long as it needs to be! If you're in high school, it's probably on the shorter end - 300 to 500 words or so. If you're in college, it's probably closer to 1000-2000 words. If it's a professional assignment, you (or your boss) knows better than me.

Can I compare more than two topics in one essay?

Certainly. For the block method, just add another block, repeating the same items per block. For the PbP method, simply include the information on your third (or nth) topic per point.

What if I can't find enough similarities or differences?

Then that means you either haven't done enough research, or you didn't pick good topics. Go back to the drawing board, dig through some more papers or articles on the subject, and try again. 

A Foolproof Editing Checklist to Take Your Work from 0 to 100

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Instructor Resources

Comparative essay.

Compare two or more literary works that we have studied in this class. Your comparative essay should not only compare but also contrast the literary texts, addressing the similarities and differences found within the texts.

Step 1: Identify the Basis for Comparison

Identify the basis of comparison. In other words, what aspect of the literature will you compare? (Theme, tone, point of view, setting, language, etc.)

Step 2: Create a List of Similarities and Differences

Carefully examine the literary texts for similarities and difference using the criteria you identified in step 1.

Step 3: Write a Thesis Statement

A thesis statement is the author’s educated opinion that can be defended. For a comparative essay, your thesis statement should assert why the similarities and differences between the literary works matter.

Step 4: Create a Structure

Before drafting, create an outline. Your introduction should draw the reader in and provide the thesis statement. The supporting paragraphs should begin with a topic sentence that supports your thesis statement; each topic sentence should then be supported with textual evidence. The conclusion should summarize the essay and prompt the reader to continue thinking about the topic.

Word Count: approximately 1500 words

Outside Sources needed: none (but use plenty of textual evidence)

• Comparative Essay. License : CC0: No Rights Reserved

Comparative Essay

How to Write a Comparative Essay – A Complete Guide

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Comparative essay is a common assignment for school and college students. Many students are not aware of the complexities of crafting a strong comparative essay. 

If you too are struggling with this, don't worry!

In this blog, you will get a complete writing guide for comparative essay writing. From structuring formats to creative topics, this guide has it all.

So, keep reading!

• 1. What is a Comparative Essay?
• 2. Comparative Essay Structure
• 3. How to Start a Comparative Essay?
• 4. How to Write a Comparative Essay?
• 5. Comparative Essay Examples
• 6. Comparative Essay Topics
• 7. Tips for Writing A Good Comparative Essay
• 8. Transition Words For Comparative Essays

What is a Comparative Essay?

A comparative essay is a type of essay in which an essay writer compares at least two or more items. The author compares two subjects with the same relation in terms of similarities and differences depending on the assignment.

The main purpose of the comparative essay is to:

• Highlight the similarities and differences in a systematic manner.
• Provide great clarity of the subject to the readers.
• Analyze two things and describe their advantages and drawbacks.

A comparative essay is also known as compare and contrast essay or a comparison essay. It analyzes two subjects by either comparing them, contrasting them, or both. The Venn diagram is the best tool for writing a paper about the comparison between two subjects.  

Moreover, a comparative analysis essay discusses the similarities and differences of themes, items, events, views, places, concepts, etc. For example, you can compare two different novels (e.g., The Adventures of Huckleberry Finn and The Red Badge of Courage).

However, a comparative essay is not limited to specific topics. It covers almost every topic or subject with some relation.

Comparative Essay Structure

A good comparative essay is based on how well you structure your essay. It helps the reader to understand your essay better. 

The structure is more important than what you write. This is because it is necessary to organize your essay so that the reader can easily go through the comparisons made in an essay.

The following are the two main methods in which you can organize your comparative essay.

Point-by-Point Method 

The point-by-point or alternating method provides a detailed overview of the items that you are comparing. In this method, organize items in terms of similarities and differences.

This method makes the writing phase easy for the writer to handle two completely different essay subjects. It is highly recommended where some depth and detail are required.

Below given is the structure of the point-by-point method. 

Block Method 

The block method is the easiest as compared to the point-by-point method. In this method, you divide the information in terms of parameters. It means that the first paragraph compares the first subject and all their items, then the second one compares the second, and so on.

However, make sure that you write the subject in the same order. This method is best for lengthy essays and complicated subjects.

Here is the structure of the block method. 

Therefore, keep these methods in mind and choose the one according to the chosen subject.

Mixed Paragraphs Method

In this method, one paragraph explains one aspect of the subject. As a writer, you will handle one point at a time and one by one. This method is quite beneficial as it allows you to give equal weightage to each subject and help the readers identify the point of comparison easily.

How to Start a Comparative Essay?

Here, we have gathered some steps that you should follow to start a well-written comparative essay.  

Choose a Topic

The foremost step in writing a comparative essay is to choose a suitable topic.

Choose a topic or theme that is interesting to write about and appeals to the reader. 

An interesting essay topic motivates the reader to know about the subject. Also, try to avoid complicated topics for your comparative essay. 

Develop a List of Similarities and Differences 

Create a list of similarities and differences between two subjects that you want to include in the essay. Moreover, this list helps you decide the basis of your comparison by constructing your initial plan. 

Evaluate the list and establish your argument and thesis statement .

Establish the Basis for Comparison 

The basis for comparison is the ground for you to compare the subjects. In most cases, it is assigned to you, so check your assignment or prompt.

Furthermore, the main goal of the comparison essay is to inform the reader of something interesting. It means that your subject must be unique to make your argument interesting.  

Do the Research 

In this step, you have to gather information for your subject. If your comparative essay is about social issues, historical events, or science-related topics, you must do in-depth research.    

However, make sure that you gather data from credible sources and cite them properly in the essay.

Create an Outline

An essay outline serves as a roadmap for your essay, organizing key elements into a structured format.

With your topic, list of comparisons, basis for comparison, and research in hand, the next step is to create a comprehensive outline. 

Here is a standard comparative essay outline:

How to Write a Comparative Essay?

Now that you have the basic information organized in an outline, you can get started on the writing process. 

Here are the essential parts of a comparative essay: 

Comparative Essay Introduction 

Start off by grabbing your reader's attention in the introduction . Use something catchy, like a quote, question, or interesting fact about your subjects. 

Then, give a quick background so your reader knows what's going on. 

The most important part is your thesis statement, where you state the main argument , the basis for comparison, and why the comparison is significant.

This is what a typical thesis statement for a comparative essay looks like:

Comparative Essay Body Paragraphs 

The body paragraphs are where you really get into the details of your subjects. Each paragraph should focus on one thing you're comparing.

Start by talking about the first point of comparison. Then, go on to the next points. Make sure to talk about two to three differences to give a good picture.

After that, switch gears and talk about the things they have in common. Just like you discussed three differences, try to cover three similarities. 

This way, your essay stays balanced and fair. This approach helps your reader understand both the ways your subjects are different and the ways they are similar. Keep it simple and clear for a strong essay.

Comparative Essay Conclusion

In your conclusion , bring together the key insights from your analysis to create a strong and impactful closing.

Consider the broader context or implications of the subjects' differences and similarities. What do these insights reveal about the broader themes or ideas you're exploring?

Discuss the broader implications of these findings and restate your thesis. Avoid introducing new information and end with a thought-provoking statement that leaves a lasting impression.

Below is the detailed comparative essay template format for you to understand better.

Comparative Essay Format

Comparative Essay Examples

Have a look at these comparative essay examples pdf to get an idea of the perfect essay.

Comparative Essay on Summer and Winter

Comparative Essay on Books vs. Movies

Comparative Essay Sample

Comparative Essay Thesis Example

Comparative Essay on Football vs Cricket

Comparative Essay on Pet and Wild Animals

Comparative Essay Topics

Comparative essay topics are not very difficult or complex. Check this list of essay topics and pick the one that you want to write about.

• How do education and employment compare?
• Living in a big city or staying in a village.
• The school principal or college dean.
• New Year vs. Christmas celebration.
• Dried Fruit vs. Fresh. Which is better?
• Similarities between philosophy and religion.
• British colonization and Spanish colonization.
• Nuclear power for peace or war?
• Bacteria or viruses.
• Fast food vs. homemade food.

Tips for Writing A Good Comparative Essay

Writing a compelling comparative essay requires thoughtful consideration and strategic planning. Here are some valuable tips to enhance the quality of your comparative essay:

• Clearly define what you're comparing, like themes or characters.
• Plan your essay structure using methods like point-by-point or block paragraphs.
• Craft an introduction that introduces subjects and states your purpose.
• Ensure an equal discussion of both similarities and differences.
• Use linking words for seamless transitions between paragraphs.
• Gather credible information for depth and authenticity.
• Use clear and simple language, avoiding unnecessary jargon.
• Dedicate each paragraph to a specific point of comparison.
• Summarize key points, restate the thesis, and emphasize significance.
• Thoroughly check for clarity, coherence, and correct any errors.

Transition Words For Comparative Essays

Transition words are crucial for guiding your reader through the comparative analysis. They help establish connections between ideas and ensure a smooth flow in your essay. 

Here are some transition words and phrases to improve the flow of your comparative essay:

Transition Words for Similarities

• Correspondingly
• In the same vein
• In like manner
• In a similar fashion
• In tandem with

Transition Words for Differences

• On the contrary
• In contrast
• Nevertheless
• In spite of
• Notwithstanding
• On the flip side
• In contradistinction

Check out this blog listing more transition words that you can use to enhance your essay’s coherence!

In conclusion, now that you have the important steps and helpful tips to write a good comparative essay, you can start working on your own essay. 

However, if you find it tough to begin, you can always hire our professional essay writing service . 

Our skilled writers can handle any type of essay or assignment you need. So, don't wait—place your order now and make your academic journey easier!

Frequently Asked Question

How long is a comparative essay.

A comparative essay is 4-5 pages long, but it depends on your chosen idea and topic.

How do you end a comparative essay?

Here are some tips that will help you to end the comparative essay.

• Restate the thesis statement
• Wrap up the entire essay
• Highlight the main points

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• Writing for Success: Compare/Contrast

LEARNING OBJECTIVES

This section will help you determine the purpose and structure of comparison/contrast in writing.

The Purpose of Compare/Contrast in Writing

Comparison in writing discusses elements that are similar, while contrast in writing discusses elements that are different. A compare-and-contrast essay, then, analyzes two subjects by comparing them, contrasting them, or both.

The key to a good compare-and-contrast essay is to choose two or more subjects that connect in a meaningful way. The purpose of conducting the comparison or contrast is not to state the obvious but rather to illuminate subtle differences or unexpected similarities. For example, if you wanted to focus on contrasting two subjects you would not pick apples and oranges; rather, you might choose to compare and contrast two types of oranges or two types of apples to highlight subtle differences. For example, Red Delicious apples are sweet, while Granny Smiths are tart and acidic. Drawing distinctions between elements in a similar category will increase the audience’s understanding of that category, which is the purpose of the compare-and-contrast essay.

Similarly, to focus on comparison, choose two subjects that seem at first to be unrelated. For a comparison essay, you likely would not choose two apples or two oranges because they share so many of the same properties already. Rather, you might try to compare how apples and oranges are quite similar. The more divergent the two subjects initially seem, the more interesting a comparison essay will be.

The Structure of a Compare/Contrast Essay

The compare-and-contrast essay starts with a thesis that clearly states the two subjects that are to be compared, contrasted, or both and the reason for doing so. The thesis could lean more toward comparing, contrasting, or both. Remember, the point of comparing and contrasting is to provide useful knowledge to the reader. Take the following thesis as an example that leans more toward contrasting:

Thesis Statement: Organic vegetables may cost more than those that are conventionally grown, but when put to the test, they are definitely worth every extra penny.

Here the thesis sets up the two subjects to be compared and contrasted (organic versus conventional vegetables), and it makes a claim about the results that might prove useful to the reader.

You may organize compare-and-contrast essays in one of the following two ways:

• According to the subjects themselves, discussing one then the other
• According to individual points, discussing each subject in relation to each point

The organizational structure you choose depends on the nature of the topic, your purpose, and your audience.

Given that compare-and-contrast essays analyze the relationship between two subjects, it is helpful to have some phrases on hand that will cue the reader to such analysis.

Phrases of Comparison and Contrast

Writing an Compare/Contrast Essay

First choose whether you want to compare seemingly disparate subjects, contrast seemingly similar subjects, or compare and contrast subjects. Once you have decided on a topic, introduce it with an engaging opening paragraph. Your thesis should come at the end of the introduction, and it should establish the subjects you will compare, contrast, or both as well as state what can be learned from doing so.

The body of the essay can be organized in one of two ways: by subject or by individual points. The organizing strategy that you choose will depend on, as always, your audience and your purpose. You may also consider your particular approach to the subjects as well as the nature of the subjects themselves; some subjects might better lend themselves to one structure or the other. Make sure to use comparison and contrast phrases to cue the reader to the ways in which you are analyzing the relationship between the subjects.

After you finish analyzing the subjects, write a conclusion that summarizes the main points of the essay and reinforces your thesis.

Compare/Contrast Essay Example

Comparing and Contrasting London and Washington, DC

By Scott McLean in Writing for Success

Both Washington, DC, and London are capital cities of English-speaking countries, and yet they offer vastly different experiences to their residents and visitors. Comparing and contrasting the two cities based on their history, their culture, and their residents show how different and similar the two are.

Both cities are rich in world and national history, though they developed on very different time lines. London, for example, has a history that dates back over two thousand years. It was part of the Roman Empire and known by the similar name, Londinium. It was not only one of the northernmost points of the Roman Empire but also the epicenter of the British Empire where it held significant global influence from the early sixteenth century on through the early twentieth century. Washington, DC, on the other hand, has only formally existed since the late eighteenth century. Though Native Americans inhabited the land several thousand years earlier, and settlers inhabited the land as early as the sixteenth century, the city did not become the capital of the United States until the 1790s. From that point onward to today, however, Washington, DC, has increasingly maintained significant global influence. Even though both cities have different histories, they have both held, and continue to hold, significant social influence in the economic and cultural global spheres.

Both Washington, DC, and London offer a wide array of museums that harbor many of the world’s most prized treasures. While Washington, DC, has the National Gallery of Art and several other Smithsonian galleries, London’s art scene and galleries have a definite edge in this category. From the Tate Modern to the British National Gallery, London’s art ranks among the world’s best. This difference and advantage has much to do with London and Britain’s historical depth compared to that of the United States. London has a much richer past than Washington, DC, and consequently has a lot more material to pull from when arranging its collections. Both cities have thriving theater districts, but again, London wins this comparison, too, both in quantity and quality of theater choices. With regard to other cultural places like restaurants, pubs, and bars, both cities are very comparable. Both have a wide selection of expensive, elegant restaurants as well as a similar amount of global and national chains. While London may be better known for its pubs and taste in beer, DC offers a different bar-going experience. With clubs and pubs that tend to stay open later than their British counterparts, the DC night life tend to be less reserved overall.

Both cities also share and differ in cultural diversity and cost of living. Both cities share a very expensive cost of living—both in terms of housing and shopping. A downtown one-bedroom apartment in DC can easily cost $1,800 per month, and a similar “flat” in London may double that amount. These high costs create socioeconomic disparity among the residents. Although both cities’ residents are predominantly wealthy, both have a significantly large population of poor and homeless. Perhaps the most significant difference between the resident demographics is the racial makeup. Washington, DC, is a “minority majority” city, which means the majority of its citizens are races other than white. In 2009, according to the US Census, 55 percent of DC residents were classified as “Black or African American” and 35 percent of its residents were classified as “white.” London, by contrast, has very few minorities—in 2006, 70 percent of its population was “white,” while only 10 percent was “black.” The racial demographic differences between the cities is drastic.

Even though Washington, DC, and London are major capital cities of English-speaking countries in the Western world, they have many differences along with their similarities. They have vastly different histories, art cultures, and racial demographics, but they remain similar in their cost of living and socioeconomic disparity.

KEY TAKEAWAYS

• A compare-and-contrast essay analyzes two subjects by either comparing them, contrasting them, or both.
• The purpose of writing a comparison or contrast essay is not to state the obvious but rather to illuminate subtle differences or unexpected similarities between two subjects.
• The thesis should clearly state the subjects that are to be compared, contrasted, or both, and it should state what is to be learned from doing so.
• There are two main organizing strategies for compare-and-contrast essays.
• Organize by the subjects themselves, one then the other.
• Organize by individual points, in which you discuss each subject in relation to each point.
• Use phrases of comparison or phrases of contrast to signal to readers how exactly the two subjects are being analyzed.
• Provided by : Lumen Learning. Located at : http://lumenlearning.com/ . License : CC BY-NC-SA: Attribution-NonCommercial-ShareAlike
• Successful Writing. Provided by : Anonymous. Located at : http://2012books.lardbucket.org/books/successful-writing/s14-07-comparison-and-contrast.html . License : CC BY-NC-SA: Attribution-NonCommercial-ShareAlike
• Comparing and Contrasting London and Washington, DC. Authored by : Scott McLean. Located at : http://2012books.lardbucket.org/books/successful-writing/s14-07-comparison-and-contrast.html . License : CC BY-NC-SA: Attribution-NonCommercial-ShareAlike
• Table of Contents

Instructor Resources (Access Requires Login)

• Overview of Instructor Resources

An Overview of the Writing Process

• Introduction to the Writing Process
• Introduction to Writing
• Your Role as a Learner
• What is an Essay?
• Reading to Write
• Defining the Writing Process
• Videos: Prewriting Techniques
• Thesis Statements
• Organizing an Essay
• Creating Paragraphs
• Conclusions
• Editing and Proofreading
• Matters of Grammar, Mechanics, and Style
• Peer Review Checklist
• Comparative Chart of Writing Strategies

Using Sources

• Quoting, Paraphrasing, and Avoiding Plagiarism
• Formatting the Works Cited Page (MLA)
• Citing Paraphrases and Summaries (APA)
• APA Citation Style, 6th edition: General Style Guidelines

Definition Essay

• Definitional Argument Essay
• How to Write a Definition Essay
• Critical Thinking
• Video: Thesis Explained
• Effective Thesis Statements
• Student Sample: Definition Essay

Narrative Essay

• Introduction to Narrative Essay
• Student Sample: Narrative Essay
• "Shooting an Elephant" by George Orwell
• "Sixty-nine Cents" by Gary Shteyngart
• Video: The Danger of a Single Story
• How to Write an Annotation
• How to Write a Summary
• Writing for Success: Narration

Illustration/Example Essay

• Introduction to Illustration/Example Essay
• "She's Your Basic L.O.L. in N.A.D" by Perri Klass
• "April & Paris" by David Sedaris
• Writing for Success: Illustration/Example
• Student Sample: Illustration/Example Essay

Compare/Contrast Essay

• Introduction to Compare/Contrast Essay
• "Disability" by Nancy Mairs
• "Friending, Ancient or Otherwise" by Alex Wright
• "A South African Storm" by Allison Howard
• Student Sample: Compare/Contrast Essay

Cause-and-Effect Essay

• Introduction to Cause-and-Effect Essay
• "Cultural Baggage" by Barbara Ehrenreich
• "Women in Science" by K.C. Cole
• Writing for Success: Cause and Effect
• Student Sample: Cause-and-Effect Essay

Argument Essay

• Introduction to Argument Essay
• Rogerian Argument
• "The Case Against Torture," by Alisa Soloman
• "The Case for Torture" by Michael Levin
• How to Write a Summary by Paraphrasing Source Material
• Writing for Success: Argument
• Student Sample: Argument Essay
• Grammar/Mechanics Mini-lessons
• Mini-lesson: Subjects and Verbs, Irregular Verbs, Subject Verb Agreement
• Mini-lesson: Sentence Types
• Mini-lesson: Fragments I
• Mini-lesson: Run-ons and Comma Splices I
• Mini-lesson: Comma Usage
• Mini-lesson: Parallelism
• Mini-lesson: The Apostrophe
• Mini-lesson: Capital Letters
• Grammar Practice - Interactive Quizzes
• De Copia - Demonstration of the Variety of Language
• Style Exercise: Voice

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How to Start a Compare and Contrast Essay

Last Updated: January 23, 2023 Fact Checked

This article was co-authored by Stephanie Wong Ken, MFA . Stephanie Wong Ken is a writer based in Canada. Stephanie's writing has appeared in Joyland, Catapult, Pithead Chapel, Cosmonaut's Avenue, and other publications. She holds an MFA in Fiction and Creative Writing from Portland State University. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 440,205 times.

Compare and contrast essays are often assigned to students because they promote critical thinking, analytical reasoning and organized writing. A compare and contrast essay should look at a subject in a new way, with fresh insight, using the similarities and the differences between two topics or two perspectives on one topic.

Sample Outline

Brainstorming Your Topic

• If your instructor has already given you your topic, you may be contrasting two things that could go into the same category, but are different from each other. For example, cats and dogs are both animals, but they are different from each other in many ways. The pro-life view on abortion, and the pro-choice view on abortion could both fit under the category of a human rights issue, but they are two very distinct views or positions.

• Try to write as many similarities and differences you can think of. For example: cats and dogs are both domesticated animals. But cats have different temperaments than dogs, and cats are known to be indoor pets, while dogs tend to need to be walked and played with outside on a constant basis.
• Think about at least one or two meaningful differences and similarities between the two subjects. For example, a compare and contrast between abortion rights could lead to meaningful notes like: The pro-life stance views fetuses are full formed humans and are often based in religious beliefs, while the pro-choice stance views fetuses as undeveloped eggs and are often based in scientific beliefs.
• To focus your list, choose categories (or possible supporting points for your paper) to classify the similarities and differences between the two subjects. For example, for the abortion rights topic, you may choose categories like: legal details, women's rights, scientific stance, and religious beliefs. You can then separate each item on the list into these categories.

• Once you are done listing 10-15 differences and 5-7 similarities, circle the most important items in each list. Then, match at least three opposites from one circle to the other circle.
• Review the list and look for three different categories that describe these traits. For example, for the abortion rights topic, you may have “scientific studies of the fetus” on the pro-choice side, and “belief in life of the fetus” on the pro-life side. One possible category could then be the debate of the life of a fetus.

• If you're compare and contrasting two historical periods or events, you may ask: When did they occur (the dates and the duration)? What happened or changed during each event? Why are they significant? Who were the important people involved? How did the events occur, and what consequences did they have later in history?
• If you're compare and contrasting two ideas or theories, you may ask: What were they about? How did they originate? Who created them? What is the central focus, claim, or goal of each theory? How do the theories apply to situations/people/things, etc.? What kind of evidence is used to support each theory?
• If you're compare and contrasting two pieces of art, you may ask: What does each piece of art describe or depict? What is their tone or mood? What themes do they address? Who created them? When were they created? How do the creators of the artworks describe their own work? Why do you think the artworks were created as they were?
• If you're compare and contrasting two people, you may ask: Where is each person from? How old are they? What, if anything, are they known for? How do they identify themselves in terms of gender, race, class, etc? Do the two people have any relationship to each other? What does each person do? Why is each person interesting? What are the defining features of each person?

• Your instructor may also ask for a discussion of more than one similarity and difference between the two topics or two perspectives. Identify any gaps in your knowledge and prepare to do research so you can better compare and contrast the two topics in your essay.

Creating an Outline

• Your thesis should note the key similarities and differences of both subjects. For example: “Dogs and cats are both seen as ideal, domesticated pets, but their temperaments and breeding set them apart.”
• Your thesis should also be able to answer the question, “So what? Why should anyone care about the positives and the negatives of owning a cat or a dog?” A reader may also wonder why you chose to look at cats and dogs, and not other domesticated pets like birds, reptiles, or rabbits. Your thesis statement is much stronger if you address these questions, and a stronger thesis can lead to a stronger essay.
• The revised thesis may look like: “Dogs and cats are both considered ideal, domesticated pets, and prove more popular than other domesticated animals like birds or rabbits, but the low maintenance and particular temperament of cats makes them better pets for a variety of households.” A more concise thesis, which allows for a more open discussion of both options, may look like: “Both cats and dogs make excellent domesticated pets, but an appropriate choice depends on the pet owner's lifestyle, finances, and living accommodations.”

• Introduction: Introduce the general topic, then introduce the two specific topics. End with your thesis, which addresses what is going to be covered in the essay.
• Leads into Aspect 1: Lifestyle, with at least two details. For example, how cats do not have to watched during the day, and are easier to get care if the owner travels or is often not home.
• Leads into Aspect 2: Cost, with at least two details. For example, how food and healthcare are less expensive for cats and how cats are less likely to cause property damage to the owner's home.
• Leads into Aspect 3: Living accommodations, with at least two details. For example, how cats do not take up a lot of space and they are less intrusive as they do not require daily walks or constant play.
• End the paragraph with a transition sentence.
• Body paragraph 2 will follow the same structure, with three Aspects and two supporting details for each aspect.
• Body paragraph 3 can follow the same structure as Body paragraph 2 and 3. Or it can be a paragraph that develops the comparison made in the previous two paragraphs. You can use scientific data, crowd sourced feedback, or a personal experience. For example, you may have been in a position where you had to compare and contrast adopting a dog or a cat and made your decision based on your lifestyle, finances, and living situation. This could serve as a personal experience to back up your previous arguments.
• Conclusion: Contains a summary of your main points, a restating of your thesis, an evaluation of your analysis and any future developments that may sway your compare and contrast to one topic over the other.

• Introduction: Introduce the general topic, then introduce the two specific topics. End with your thesis, which addresses what is going to covered in the essay.
• Leads into Topic 1, Aspect 1: Cats, with two details supporting cats in the argument. For example, how cats do not have to watched during the day, and are easier to get care if the owner travels or is often not home.
• Leads into Topic 2, Aspect 1: Dogs, with two details contrasting dogs to the previous argument. For example, how dogs are pack animals and shouldn't be left alone for long periods of time, and how it can be difficult to find care for a dog when the owner is away.
• Ends with a transition sentence.
• Body paragraph 2 will follow the same structure, with a discussion of Topic 1 and Topic 2 in relation to Aspect 2, for example: “Cats are less expensive to own and care for.” There should be two supporting details for each topic.
• Body paragraph 3 will follow the same structure, with a discussion of Topic 1 and Topic 2 in relation to Aspect 3, for example: “Cats need less special house accommodations than dogs.” There should be two supporting details for each topic.

Writing an Introduction

• You should also avoid announcing your intentions in a straightforward and formal way. For example, skip statements like “In this paper, I will” or “The purpose of this essay is to”.
• Instead, your reader should be able to perceive the purpose of your essay through the first two sentences in your beginning paragraph.

• An interesting or surprising example: This could be a personal experience of when a cat proved to be a better pet than a dog, or a scientific study that shows the differences between cats and dogs.
• A provocative quotation: This could be from a source you used for your essay or one that feels relevant to your topic.
• A vivid anecdote: An anecdote is a very short story that carries moral or symbolic weight. Think of an anecdote that might be a poetic or powerful way to start your essay. You can also look through your research for your essay for any note worthy anecdotes.
• A thought provoking question: Think of a question that will get your reader thinking and engaged in your topic. For example: “Did you always wish you had a cat but ended up with a dog when you were growing up?”

• The writing process can be an important way to organize your ideas, think through certain points, and refine your thoughts. Writing or revising the introduction once you are done your essay will ensure the introduction matches the body of your essay.

Community Q&A

• Ask a friend, advisor or classmate to read your introduction and thesis. Having someone provide feedback before you get into the body of your compare and contrast essay can help you ensure you have a well written, thorough and purposeful start to your paper. Thanks Helpful 0 Not Helpful 0

You Might Also Like

• ↑ https://www.kellogg.edu/upload/eng151/chapter/writing-for-success-comparecontrast/index.html
• ↑ https://writingcenter.unc.edu/tips-and-tools/comparing-and-contrasting/
• ↑ http://writingcenter.unc.edu/handouts/comparing-and-contrasting/
• ↑ https://www.grammarly.com/blog/compare-contrast/
• ↑ https://open.lib.umn.edu/writingforsuccess/chapter/10-7-comparison-and-contrast/
• ↑ http://writingcenter.unc.edu/handouts/introductions/

About This Article

To start a compare and contrast essay, start by making a list of similarities and differences between your subjects. Once you have a clearer idea of how your subjects work in relation to each other, you can work on your introduction. Think about ways to hook or grab your reader’s attention with your opening, like giving a surprising or interesting fact or a vivid anecdote. You can also ask a thought-provoking question or use a provocative quotation. Then, introduce your general topic. Once you give your reader a bit of context, you can discuss your two specific subjects in a bit more detail before stating your thesis. Your thesis should note the main similarities and differences between both subjects. For example, “Dogs and cats are both seen as ideal domestic pets, but their temperaments and breeding set them apart.” To learn how to organize your compare and contrast essay, keep reading! Did this summary help you? Yes No

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8.6: Essay Type- Comparing and Contrasting Literature

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• Page ID 101138

• Heather Ringo & Athena Kashyap
• City College of San Francisco via ASCCC Open Educational Resources Initiative

Compare and Contrast Essay Basics

The Compare and Contrast Essay is a literary analysis essay, but, instead of examining one work, it examines two or more works. These works must be united by a common theme or thesis statement. For example, while a literary analysis essay might explore the significance of ghosts in William Shakespeare's Hamlet, a compare/contrast essay might explore the significance of the supernatural in Hamlet and Macbeth .

Literary Analysis Thesis Statement:

While Horatio seems to think the ghost of Old Hamlet is a demon trying to lead Hamlet to death, and Gertrude and Claudius think it is a figment of Hamlet's insanity, Hamlet's status as an unreliable narrator and the ghost actually symbolizes the oppression of Catholics during Shakespeare's time period.

Compare and Contrast Thesis Statement:

The unreliable narrators paired with the ghosts in both Hamlet and Macbeth symbolize the oppression of Catholics in Shakespeare's time period.

Essay Genre Expectations

• Use first-person pronouns sparingly (you, me, we, our)
• Avoid colloquialisms
• Spell out contractions
• Use subject-specific terminology, such as naming literary devices
• Texts: two or more
• Avoid summary. Aim for analysis and interpretation
• MLA formatting and citations

Organization

While the literary analysis essay follows a fairly simple argumentative essay structure, the compare and contrast essay is slightly more complicated. It might be arranged by:

• Literary work (the block method)
• Topics/subtopics (the point-by-point method)

In general, ensure each paragraph supports the thesis statement and that both literary works receive equal attention. Include as many body paragraphs as needed to build your argument.

First Option for Organization: The Block Method

In this first option for organization, you will need to discuss both literary works in the introduction and thesis statement, but then the body of the paper will be divided in half. The first half of the body paragraphs should focus on one literary work, while the second half of the body paragraphs should focus on the other literary work.

• Background of topic
• Background of works related to topic
• Thesis Statement
• Topic sentence
• Introduction of evidence
• Evidence from the first literary work
• Explanation of evidence
• Analysis of evidence
• Evidence from the second literary work
• Restatement of thesis in new words
• Summary of essay arguments

Second Option for Organization: The Point-by-Point Method

With this second option for organization, you may decide to write about both literary works within the same body paragraph every time, or you may choose to consistently alternate back and forth between the literary works in separate body paragraphs.

• Evidence from both literary works

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• How to structure an essay: Templates and tips

How to Structure an Essay | Tips & Templates

Published on September 18, 2020 by Jack Caulfield . Revised on July 23, 2023.

The basic structure of an essay always consists of an introduction , a body , and a conclusion . But for many students, the most difficult part of structuring an essay is deciding how to organize information within the body.

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Table of contents

The basics of essay structure, chronological structure, compare-and-contrast structure, problems-methods-solutions structure, signposting to clarify your structure, other interesting articles, frequently asked questions about essay structure.

There are two main things to keep in mind when working on your essay structure: making sure to include the right information in each part, and deciding how you’ll organize the information within the body.

Parts of an essay

The three parts that make up all essays are described in the table below.

Order of information

You’ll also have to consider how to present information within the body. There are a few general principles that can guide you here.

The first is that your argument should move from the simplest claim to the most complex . The body of a good argumentative essay often begins with simple and widely accepted claims, and then moves towards more complex and contentious ones.

For example, you might begin by describing a generally accepted philosophical concept, and then apply it to a new topic. The grounding in the general concept will allow the reader to understand your unique application of it.

The second principle is that background information should appear towards the beginning of your essay . General background is presented in the introduction. If you have additional background to present, this information will usually come at the start of the body.

The third principle is that everything in your essay should be relevant to the thesis . Ask yourself whether each piece of information advances your argument or provides necessary background. And make sure that the text clearly expresses each piece of information’s relevance.

The sections below present several organizational templates for essays: the chronological approach, the compare-and-contrast approach, and the problems-methods-solutions approach.

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The chronological approach (sometimes called the cause-and-effect approach) is probably the simplest way to structure an essay. It just means discussing events in the order in which they occurred, discussing how they are related (i.e. the cause and effect involved) as you go.

A chronological approach can be useful when your essay is about a series of events. Don’t rule out other approaches, though—even when the chronological approach is the obvious one, you might be able to bring out more with a different structure.

Explore the tabs below to see a general template and a specific example outline from an essay on the invention of the printing press.

• Thesis statement
• Discussion of event/period
• Consequences
• Importance of topic
• Strong closing statement
• Claim that the printing press marks the end of the Middle Ages
• Background on the low levels of literacy before the printing press
• Thesis statement: The invention of the printing press increased circulation of information in Europe, paving the way for the Reformation
• High levels of illiteracy in medieval Europe
• Literacy and thus knowledge and education were mainly the domain of religious and political elites
• Consequence: this discouraged political and religious change
• Invention of the printing press in 1440 by Johannes Gutenberg
• Implications of the new technology for book production
• Consequence: Rapid spread of the technology and the printing of the Gutenberg Bible
• Trend for translating the Bible into vernacular languages during the years following the printing press’s invention
• Luther’s own translation of the Bible during the Reformation
• Consequence: The large-scale effects the Reformation would have on religion and politics
• Summarize the history described
• Stress the significance of the printing press to the events of this period

Essays with two or more main subjects are often structured around comparing and contrasting . For example, a literary analysis essay might compare two different texts, and an argumentative essay might compare the strengths of different arguments.

There are two main ways of structuring a compare-and-contrast essay: the alternating method, and the block method.

Alternating

In the alternating method, each paragraph compares your subjects in terms of a specific point of comparison. These points of comparison are therefore what defines each paragraph.

The tabs below show a general template for this structure, and a specific example for an essay comparing and contrasting distance learning with traditional classroom learning.

• Synthesis of arguments
• Topical relevance of distance learning in lockdown
• Increasing prevalence of distance learning over the last decade
• Thesis statement: While distance learning has certain advantages, it introduces multiple new accessibility issues that must be addressed for it to be as effective as classroom learning
• Classroom learning: Ease of identifying difficulties and privately discussing them
• Distance learning: Difficulty of noticing and unobtrusively helping
• Classroom learning: Difficulties accessing the classroom (disability, distance travelled from home)
• Distance learning: Difficulties with online work (lack of tech literacy, unreliable connection, distractions)
• Classroom learning: Tends to encourage personal engagement among students and with teacher, more relaxed social environment
• Distance learning: Greater ability to reach out to teacher privately
• Sum up, emphasize that distance learning introduces more difficulties than it solves
• Stress the importance of addressing issues with distance learning as it becomes increasingly common
• Distance learning may prove to be the future, but it still has a long way to go

In the block method, each subject is covered all in one go, potentially across multiple paragraphs. For example, you might write two paragraphs about your first subject and then two about your second subject, making comparisons back to the first.

The tabs again show a general template, followed by another essay on distance learning, this time with the body structured in blocks.

• Point 1 (compare)
• Point 2 (compare)
• Point 3 (compare)
• Point 4 (compare)
• Advantages: Flexibility, accessibility
• Disadvantages: Discomfort, challenges for those with poor internet or tech literacy
• Advantages: Potential for teacher to discuss issues with a student in a separate private call
• Disadvantages: Difficulty of identifying struggling students and aiding them unobtrusively, lack of personal interaction among students
• Advantages: More accessible to those with low tech literacy, equality of all sharing one learning environment
• Disadvantages: Students must live close enough to attend, commutes may vary, classrooms not always accessible for disabled students
• Advantages: Ease of picking up on signs a student is struggling, more personal interaction among students
• Disadvantages: May be harder for students to approach teacher privately in person to raise issues

An essay that concerns a specific problem (practical or theoretical) may be structured according to the problems-methods-solutions approach.

This is just what it sounds like: You define the problem, characterize a method or theory that may solve it, and finally analyze the problem, using this method or theory to arrive at a solution. If the problem is theoretical, the solution might be the analysis you present in the essay itself; otherwise, you might just present a proposed solution.

The tabs below show a template for this structure and an example outline for an essay about the problem of fake news.

• Introduce the problem
• Provide background
• Describe your approach to solving it
• Define the problem precisely
• Describe why it’s important
• Indicate previous approaches to the problem
• Present your new approach, and why it’s better
• Apply the new method or theory to the problem
• Indicate the solution you arrive at by doing so
• Assess (potential or actual) effectiveness of solution
• Describe the implications
• Problem: The growth of “fake news” online
• Prevalence of polarized/conspiracy-focused news sources online
• Thesis statement: Rather than attempting to stamp out online fake news through social media moderation, an effective approach to combating it must work with educational institutions to improve media literacy
• Definition: Deliberate disinformation designed to spread virally online
• Popularization of the term, growth of the phenomenon
• Previous approaches: Labeling and moderation on social media platforms
• Critique: This approach feeds conspiracies; the real solution is to improve media literacy so users can better identify fake news
• Greater emphasis should be placed on media literacy education in schools
• This allows people to assess news sources independently, rather than just being told which ones to trust
• This is a long-term solution but could be highly effective
• It would require significant organization and investment, but would equip people to judge news sources more effectively
• Rather than trying to contain the spread of fake news, we must teach the next generation not to fall for it

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Signposting means guiding the reader through your essay with language that describes or hints at the structure of what follows.  It can help you clarify your structure for yourself as well as helping your reader follow your ideas.

The essay overview

In longer essays whose body is split into multiple named sections, the introduction often ends with an overview of the rest of the essay. This gives a brief description of the main idea or argument of each section.

The overview allows the reader to immediately understand what will be covered in the essay and in what order. Though it describes what  comes later in the text, it is generally written in the present tense . The following example is from a literary analysis essay on Mary Shelley’s Frankenstein .

Transitions

Transition words and phrases are used throughout all good essays to link together different ideas. They help guide the reader through your text, and an essay that uses them effectively will be much easier to follow.

Various different relationships can be expressed by transition words, as shown in this example.

Because Hitler failed to respond to the British ultimatum, France and the UK declared war on Germany. Although it was an outcome the Allies had hoped to avoid, they were prepared to back up their ultimatum in order to combat the existential threat posed by the Third Reich.

Transition sentences may be included to transition between different paragraphs or sections of an essay. A good transition sentence moves the reader on to the next topic while indicating how it relates to the previous one.

… Distance learning, then, seems to improve accessibility in some ways while representing a step backwards in others.

However , considering the issue of personal interaction among students presents a different picture.

If you want to know more about AI tools , college essays , or fallacies make sure to check out some of our other articles with explanations and examples or go directly to our tools!

• Ad hominem fallacy
• Post hoc fallacy
• Appeal to authority fallacy
• False cause fallacy
• Sunk cost fallacy

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The structure of an essay is divided into an introduction that presents your topic and thesis statement , a body containing your in-depth analysis and arguments, and a conclusion wrapping up your ideas.

The structure of the body is flexible, but you should always spend some time thinking about how you can organize your essay to best serve your ideas.

An essay isn’t just a loose collection of facts and ideas. Instead, it should be centered on an overarching argument (summarized in your thesis statement ) that every part of the essay relates to.

The way you structure your essay is crucial to presenting your argument coherently. A well-structured essay helps your reader follow the logic of your ideas and understand your overall point.

Comparisons in essays are generally structured in one of two ways:

• The alternating method, where you compare your subjects side by side according to one specific aspect at a time.
• The block method, where you cover each subject separately in its entirety.

It’s also possible to combine both methods, for example by writing a full paragraph on each of your topics and then a final paragraph contrasting the two according to a specific metric.

You should try to follow your outline as you write your essay . However, if your ideas change or it becomes clear that your structure could be better, it’s okay to depart from your essay outline . Just make sure you know why you’re doing so.

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Open Access

Peer-reviewed

Research Article

How do authors’ perceptions of their papers compare with co-authors’ perceptions and peer-review decisions?

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Machine Learning Department, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Roles Conceptualization, Data curation, Methodology, Writing – original draft

Affiliation New Economic School, Moscow, Russia

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Yahoo! Research, New York, New York, United States of America

Roles Conceptualization, Data curation, Investigation, Methodology, Supervision

Affiliation Google Deepmind, Montreal, Canada

Affiliation Department of Computer Science, Stanford University, Stanford, California, United States of America

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Microsoft Research, New York, New York, United States of America

Roles Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization

Affiliation Independent Researcher, Shanghai, China

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Supervision, Validation, Visualization, Writing – review & editing

Affiliation Department of Computer Science, University of Maryland, College Park, Maryland, United States of America

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Jacobs Technion-Cornell Institute, Cornell Tech, New York, New York, United States of America

* E-mail: [email protected]

• Charvi Rastogi, 
• Ivan Stelmakh, 
• Alina Beygelzimer, 
• Yann N. Dauphin, 
• Percy Liang, 
• Jennifer Wortman Vaughan, 
• Zhenyu Xue, 
• Hal Daumé III, 
• Emma Pierson, 
• Nihar B. Shah

• Published: April 10, 2024
• https://doi.org/10.1371/journal.pone.0300710
• Peer Review
• Reader Comments

How do author perceptions match up to the outcomes of the peer-review process and perceptions of others? In a top-tier computer science conference (NeurIPS 2021) with more than 23,000 submitting authors and 9,000 submitted papers, we surveyed the authors on three questions: (i) their predicted probability of acceptance for each of their papers, (ii) their perceived ranking of their own papers based on scientific contribution, and (iii) the change in their perception about their own papers after seeing the reviews. The salient results are: (1) Authors had roughly a three-fold overestimate of the acceptance probability of their papers: The median prediction was 70% for an approximately 25% acceptance rate. (2) Female authors exhibited a marginally higher (statistically significant) miscalibration than male authors; predictions of authors invited to serve as meta-reviewers or reviewers were similarly calibrated, but better than authors who were not invited to review. (3) Authors’ relative ranking of scientific contribution of two submissions they made generally agreed with their predicted acceptance probabilities (93% agreement), but there was a notable 7% responses where authors predicted a worse outcome for their better paper. (4) The author-provided rankings disagreed with the peer-review decisions about a third of the time; when co-authors ranked their jointly authored papers, co-authors disagreed at a similar rate—about a third of the time. (5) At least 30% of respondents of both accepted and rejected papers said that their perception of their own paper improved after the review process. The stakeholders in peer review should take these findings into account in setting their expectations from peer review.

Citation: Rastogi C, Stelmakh I, Beygelzimer A, Dauphin YN, Liang P, Wortman Vaughan J, et al. (2024) How do authors’ perceptions of their papers compare with co-authors’ perceptions and peer-review decisions? PLoS ONE 19(4): e0300710. https://doi.org/10.1371/journal.pone.0300710

Editor: Tobias Otterbring, University of Agder: Universitetet i Agder, NORWAY

Received: December 1, 2023; Accepted: March 4, 2024; Published: April 10, 2024

Copyright: © 2024 Rastogi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Data Availability: In this work, we analyze data obtained from the scientific conference NeurIPS (Conference on Neural Information Processing Systems) 2021 for publication of research in AI. For this, we worked in collaboration with the conference organizers of Neurips 2021 (Alina Beygelzimer, Yann N. Dauphin, Percy Liang, Jennifer Wortman Vaughan). We are not able to share this data in any form, because of the following reasons: 1. This is highly sensitive data concerning authors and reviewers both, where authors and reviewers provide their honest opinion with the belief that this would not affect them personally. 2. NeurIPS 2021 is a double-blind conference and maintaining the double-blindness is an important aspect of the reviewing process. Releasing de-identified data would dilute the double-blindness. 3. It would violate the confidentiality agreement between the researchers who participated in the conference and the conference organizers. We are only able to share the aggregated statistics, which are provided in the manuscript. Further, any data requests from researchers who meet the criteria for access to confidential data may be sent to the Neural Information Processing Systems foundation that is the institutional body responsible for running the conference NeurIPS 2021, or to the Institutional Review Board of Microsoft Research (contact via [email protected] ).

Funding: The author(s) received no specific funding for this work.

Competing interests: The authors have declared that no competing interests exist.

1 Introduction

Peer review is used widely in scientific research for quality control as well as selecting ‘interesting’ research. However, a number of studies have documented low agreement among reviewers [ 1 – 7 ], and researchers often lament various problems with peer review [ 8 – 10 ]. On the other hand, surveys of researchers about their general perception of peer review reveal that researchers across various scientific disciplines consider peer review to be important, yet in need of improvements [ 11 – 15 ]. But how do author perceptions on their submitted papers match up with outcomes of the peer-review process? We investigate this question in this work.

We conducted a survey-based experiment in the Neural Information Processing Systems (NeurIPS) 2021 conference, which is a top-tier conference in the field of machine learning. (Readers outside computer science unfamiliar with its publishing culture may note that in computer science, conferences review full papers and are commonly the terminal venue of publication of papers). The conference had over 9,000 papers submitted by over 23,000 authors. The conference traditionally has accepted 20–25% of the submitted papers, and in 2021 the acceptance rate was 25.8%.

We designed and executed a survey to understand authors’ perceptions about their submitted papers as well as their perceptions of the peer-review process in relation to their papers. In particular, we asked three questions:

• It is well known that the peer-review process (at the NeurIPS conference) has a low acceptance rate and a high amount of disagreement between reviewers [ 3 , 5 , 16 ]. Do authors take this into account when setting their expectations from the peer review process? Specifically, we aim to understand the calibration of authors with respect to the review process, by asking them to predict the probability of acceptance of their submitted paper(s).
• Motivated by authors often lamenting that their paper that they thought was best was rejected and the one they thought had lower scientific merit was accepted, we aim to quantify the discrepancy between the author’s and the reviewers’ relative perceptions of papers by asking authors to rank their papers in terms of their perceived scientific contribution and comparing this against acceptance decisions.
• Finally, while the two questions above measured the perception before the review process, we also measured the perception after they see the reviews, by asking authors whether the review process changed their perception of their own paper.

We then analyze how author perceptions align with the outcomes of the peer-review process and the perceptions of co-authors. The results of this work are useful to set expectations from the peer-review process, identify its fundamental limitations, and help guide the policies that the community implements as well as future research on improving peer review.

The rest of the paper is organized as follows. Section 2 discusses related work. In Section 3, we present details of the questions asked to the participants (authors of submitted papers). We provide basic statistics of the responses in Section 4 and our main analysis of the responses in Section 5. We conclude with a discussion in Section 6.

2 Related work

There are a number of papers in the literature that conduct surveys of authors. [ 17 ] survey authors of accepted papers from 56 computer science conferences. The survey was conducted after these papers were published. Questions pertained to the paper’s history (amount of time needed to write it; resubmission history) and their opinions about the conference’s rebuttal process. The respondents were also asked whether they found the reviews helpful in improving their paper. A total of 34.1% of the respondents said they were ‘very helpful,’ 52.7% said they were ‘somewhat helpful,’ and 13.2% said they were ‘not at all’ helpful. Similar surveys asking authors whether peer review helped improve their paper are also conducted in other fields [ 11 , 18 , 19 ]. It is important to note that this question is different from our third question which asks whether their own perception of the quality of their own paper changed after the review process. Our question pertains to the same (version of the) paper but perception before and after the reviews; on the other hand, their question pertains to two different versions of the paper (initial submission and after reviewers’ suggestions) and whether there was an improvement across the versions. They also find that for these questions, responses from different authors to the same paper were usually very similar.

[ 20 ] surveys authors of research proposals on their perception of random allocation of grant funding. They do find support for such randomized decisions, which have now also been implemented [ 21 ]. [ 22 , 23 ] conduct or analyze surveys of authors for breach of ethics. While computer science was not their focus, within computer science as well, there have been discoveries of breach of ethics in the peer-review process [ 24 – 28 ].

Several other surveys [ 11 – 15 ] find a strong support for peer review among researchers. They also find that researchers see a need to improve peer review.

The work of [ 29 ] is closest to ours. They conduct a survey in the Australasian Association for Engineering Education (AAEE) annual conference 2010 and 2011, comprising a total of 70 papers and 140 reviews. The survey asked authors to rate their own papers and also to rate reviews. Their survey received responses from 23 authors in 2010 and from 37 authors in the 2011 edition. They found that overall 75% of authors rated their paper higher than the average of the reviewers’ ratings for their paper. Furthermore, their survey found that the academic rank of the respondent was not correlated with the accuracy of the respondent’s prediction of the reviews.

[ 30 ] offers a somewhat tongue in cheek commentary pertaining to authors’ perceptions: “if authors systematically overestimate the quality of their own work, then any paper rejected near the threshold is likely to appear (to the author) to be better than a large percentage of the actual conference program, implying (to the author) that the program committee was incompetent or venal. When a program committee member’s paper is rejected, the dynamic becomes self-sustaining: the accept threshold must be higher than the (self-perceived) merit of their own paper, encouraging them to advocate rejecting even more papers.”

Within the machine learning community, [ 31 ] survey reviewers about visibility of papers submitted to a conference that anonymizes authors, and intentionally searching online for assigned papers. Or current work contributes to a tradition in machine learning venues of experimentation aimed at understanding and improving the peer-review process [ 3 , 5 , 16 , 32 – 38 ].

See [ 39 ] for a more extensive discussion about research on the peer-review process and associated references.

Our experiment was conducted in two phases. Phase 1 was conducted shortly after the paper submission deadline, and Phase 2 was conducted after the authors were shown their initial reviews. (During the NeurIPS 2021 review process, initial reviews were released to authors, who had the chance to respond to the reviews and engage in subsequent discussion with the reviewers. Reviews were then updated before final acceptance decisions were released). We asked two questions during Phase 1 and one question during Phase 2, as described below. All of the questions were optional. Authors were told that their responses will not be seen by anyone during the review process and will not affect the decisions on their papers. The study protocol was approved by an independent institutional review board (IRB). A more detailed description of privacy and confidentiality of responses can be found in Appendix A.

Phase 1 : The first phase was conducted four days after the deadline for submission of papers, and was open for ten days. All authors of submitted papers were asked the following question:

• Acceptance probability . What is your best estimate of the probability (as a percentage) that this submission will be accepted? Please use a scale of 0 to 100, where 0 = “no chance of acceptance” and 100 = “certain to be accepted.” Your estimate should reflect only how likely you believe it is that the paper will be accepted at NeurIPS, which may or may not reflect your perception of the actual quality of the submission. For context, over the past four years, about 21% of NeurIPS submissions were accepted.

Every author who had authored more than one submitted paper was also asked the following second question:

• Paper quality ranking . Rank your submissions in terms of your own perception of their scientific contributions to the NeurIPS community, if published in their current form. Rank 1 indicates the submission with the greatest scientific contribution; ties are allowed, but please use them sparingly.

Notice that the two questions differ in two ways. The acceptance probability question asks for a value (chance of acceptance), and this value represents the authors’ perception of the outcomes of the peer-review process for their paper. On the other hand, the paper quality ranking question asks for a ranking, and furthermore, pertains to the author’s own perception of the scientific contribution made by their paper.

Phase 2 : The second phase was conducted after the authors could see the (initial) reviews. This phase comprised a single question, and the participants were told they could answer this question irrespective of whether they participated in Phase 1 or not.

• My perception became much more positive
• My perception became slightly more positive
• My perception did not change
• My perception became slightly less positive
• My perception became much less positive

More details about the timeline and instructions are provided in Appendix A. The instructions were designed to give participants complete information about how their provided data would be used. The participant emailing and data collection for the experiment started on June 1, 2021 and ended on September 28, 2021.

3.1 Ethics statement

The experiment was reviewed and approved as exempt research by the Microsoft Research IRB, and the data collected were analysed anonymously.

4 Basic statistics

In this section, we provide some basic statistics pertaining to the experiment.

4.1 NeurIPS 2021 conference

• Total number of papers submitted to the conference: 9,034.
• Total number of unique authors who submitted papers to the conference: 23,882.
• Total number of author-paper pairs: 37,100. (Only authors with a profile on the conference management platform (OpenReview.net) could participate in the experiment, yielding 34,713 eligible author-paper pairs).
• Percentage of submitted papers that were eventually accepted to the conference: 25.8%.

We now move on to discuss the responses to the three questions.

4.2 “Acceptance probability” question

• Number of responses: 9,907 (26.7% of author-paper pairs).
• Number of papers with at least one response: 6,278 (69.5%).

4.3 “Paper quality ranking” question

• Number of authors with more than one submission: 6,237.
• Total number of author-paper pairs for these authors: 19,455.
• Number of “rank” responses received (out of 19,455): 6,908 (35.5% response rate).

4.4 “Change of perception” question

• Number of papers remaining after reviews were released (as some were rejected/withdrawn): 8,765
• Number of author-paper pairs remaining: 36,103.
• Number of responses: 4,435 (12.3% response rate).

4.4.1 Response rates and breakdown.

The overall response rates in our experiment are broadly in the ballpark of the response rates of other surveys in computer science. The survey by [ 40 ] in the CHI 2011 conference had a response rate of 16%. [ 31 ] conduct multiple surveys: an anonymous survey in the ICML 2021 and EC 2021 conferences had response rates of 16% and 51% respectively; a second, non-anonymous opt-in survey in EC 2021 had a response rate of 55.78%. [ 17 ] survey authors of accepted papers in 56 computer systems conferences, with response rates ranging from 0% to 59% across these conferences. The survey by [ 29 ] was opt-in in 2011 and their response rate was 28%.

We used gender self-reported in OpenReview profiles. The conference had 23,581 author-paper pairs with a self-reported gender “male” of the author, 3,328 author-paper pairs with a self-reported gender “female” of the author. We omit other gender-based subgroups in our analysis, following concerns about privacy and noise due to the small sample size of responses from these groups. Further, 7,432 author-paper pairs did not have a self-reported gender of the author. In phase 1, the response rate among author-paper pairs with self-reported gender as “male” was 30.9%, that among self-reported gender as “female” was 24.7%, and among the rest was 22%.

In terms of seniority, while we do not have a perfect measure of seniority, we used the role within the NeurIPS 2021 reviewing process as a proxy. We consider three levels of seniority. Ordered by decreasing seniority, these levels comprise of: (1) authors who were invited to serve as area chairs or senior area chairs at NeurIPS 2021, whom we refer to as “meta-reviewers”; (2) authors who were invited to serve as reviewers; and (3) authors who were in neither of the two aforementioned groups. The conference saw 3,834 author-paper pairs for authors invited as meta-reviewers, 10,938 pairs for authors invited as reviewers, and 19,941 for those who were in neither list. The response rate (for acceptance probability) was 21% among authors invited as meta-reviewers, 28.9% among authors invited to review, and 29.8% for those in neither list.

In terms of paper outcomes, out of all the responses to Phase 1 (acceptance probability) of the experiment, 27% of the responses pertained to papers that were eventually accepted. Thus, in Phase 1 we did not see any large non-response bias with respect to the papers that were eventually accepted or rejected.

The “change of perception” question (Phase 2) was asked after the authors saw the reviews. Some authors with unfavorable reviews withdrew their papers before this phase. Some other papers were rejected before this phase for reasons such as formatting violations. As a result, out of all the responses to Phase 2 of the experiment, there was a significantly higher representation of accepted papers: 39.8% of the responses pertained to papers that were eventually accepted. Out of the 4,435 responses (author-paper pairs) in this phase, 3,259 were from authors who self-identified as male, 310 from authors who self-identified as female, and 866 from those who did not provide a gender or those who did not self-identify as male or female. In terms of participation in the review process, 324 responses were from authors who were invited to serve as meta-reviewers, 1,544 from authors who were invited to serve as reviewers, and 2,567 from neither.

5 Main analysis and results

We now present the main results.

5.1 Calibration in prediction of acceptance

We begin by looking at the responses to the acceptance probability question, and comparing it with actual acceptance decisions. In Fig 1a , we plot the relation between responses given by authors to the question and the actual acceptance rates for these papers. Here, the blue dots represent responses with at least 50 samples, which together comprise 94% of all responses.

• PPT PowerPoint slide
• PNG larger image
• TIFF original image

( a ) Plot of authors’ predictions of chances of acceptance of the paper versus the actual acceptance rates for each response. The diagonal line represents perfect calibration and the (blue) dots represent authors’ responses. ( b ) Plots of authors’ predictions, for papers that were eventually accepted (thin yellow line) and rejected (thick blue line). The x-axis represents the fraction of responses with predicted percent chance greater or equal to the corresponding value on the y-axis. In other words, the x-axis is the fraction of responses with prediction greater than or equal to the corresponding y value.

https://doi.org/10.1371/journal.pone.0300710.g001

We find that there is a nearly three-fold overestimation overall: The median of the acceptance probabilities estimated by the respondents is 70% and the mean is 67.7%. In comparison, we had primed respondents by mentioning that the acceptance rate in the past four years was about 21%. (The acceptance rate at NeurIPS 2021 ended up being 25.8%.) The fact that participants over-predict aligns with studies in other settings [ 41 , 42 ] that also find overconfidence effects. Also observe in Fig 1a that interestingly, the authors’ predictions track perfect calibration quite well for responses up to 35%, whereas responses greater than (to the right of) 35% are uncorrelated with the actual acceptance rate.

In Fig 1b , we sort the responses in descending order (on the x axis) and plot the values of these responses (y axis). We make separate plots for papers that were eventually accepted and those that were eventually rejected. We see that these two plots track each other quite closely, with papers that were eventually accepted having slightly higher predictions. We also observe indications of over estimation here—more than 5% of responses predict a 100% chance of their paper getting accepted, about 50% responses predict chances of 75% or higher, whereas fewer than 15% of responses provide a prediction smaller than 40%.

5.2 Role of demographics

Next we look at the role of demographics in calibration. For this we now define the calibration error in prediction of acceptance by any author. First, based on Section 5.1 and Fig 1a , we note that responses were on average overly confident, that is the predicted probability of acceptance was higher than the observed rate of acceptance. Further, we also observe that within each demographic-based subgroup, authors on average predicted a higher acceptance probability of their submission as compared to the acceptance rate within that subgroup. We thus know the direction of miscalibration of each subgroup.

We measure the calibration error of any subgroup in terms of the mean Brier score (i.e., squared loss). The Brier score [ 43 ] is a strictly proper scoring rule that measures the accuracy of probabilistic predictions: Given a prediction (value in the interval [0, 1] representing the probability of acceptance) and the outcome (accept = 1, reject = 0), the Brier score equals the square of the difference between the prediction and the outcome. To get a sense of the value of the Brier score, if 25% of the papers are accepted and all respondents provide a prediction of 0.25, then the Brier score equals 0.1875; if all respondents provide a prediction of 0.8 then the Brier score equals 0.49. In our analysis, we had decided in advance to execute statistical tests comparing calibration of male and female authors and of reviewers and meta-reviewers; we had decided to not compare the remaining subgroups due to possibility of high heterogeneity among them. We provide the main details about our analysis in this subsection, and provide additional details in Appendix B.

5.2.1 Gender.

We compute the average calibration error for gender subgroups using the gender data retrieved from participants’ Open Review profiles. Our approach accounts for potential confounding by seniority and geographic region in the analysis for calibration error across gender groups. The calculation is described in detail in Appendix B. See Fig 2a for the average calibration error for the “male”, “female” and “not reported” subgroups, where “not reported” comprises of authors who did not provide their gender information in their Open Review profile. We do not report statistics for other gender subgroups, which are very small, to preserve respondent privacy.

The error bars indicate 95% confidence intervals, obtained via bootstrapping. ( a ) Gender-based grouping. ( b ) Seniority-based grouping.

https://doi.org/10.1371/journal.pone.0300710.g002

In many fields of science there is research showing that there exists a confidence gap between female and male participants [ 44 , 45 ], where men are generally found to overestimate and women underestimate. In NeurIPS 2021, we test for significance of difference in calibration error by male authors and female authors. To test this hypothesis, we consider the test statistic of the difference in calibration errors between female authors and male authors and conduct a two-sided test. We find that there is a statistically significant difference ( p = 0.0012) at level 0.05. However, note that the effect size—the difference in the calibration errors between female authors (0.44) and male authors (0.40)—is small (0.04).

5.2.2 Seniority.

We now investigate the role of seniority in authors’ calibration of probability of acceptance. As mentioned in Section 4, we consider three subgroups defined by the authors’ reviewing role as a proxy for seniority, namely, authors invited to serve as meta-reviewers, authors invited to serve as reviewers, and the remaining authors. Fig 2b shows the average calibration error for these three subgroups, weighted to account for confounding by other demographics (see Appendix B for details). Further, we test for significance of difference in the average calibration error between the sets of meta-reviewers and reviewers. As in Section 5.2.1, we consider the difference in the mean calibration error as the test statistic. The difference in calibration error between meta-reviewers (0.33) and reviewers (0.36) is 0.03, and the difference is not statistically significant ( p = 0.055) at level 0.05. As mentioned earlier, we had apriori decided to not run any statistical tests on the “neither” group.

5.3 Prediction of acceptance vs. perceived scientific contribution

We investigate the consistency between the predictions by authors about the acceptance of their papers and the scientific contribution (paper quality) of those papers as perceived by the authors. There were a total of 6,024 pairs of papers by the same author where the author provided their responses for both questions for both papers. We break down the responses in Fig 3 .

This plot is based on 6,024 such responses. In particular, the first two bars enumerate the amount of agreement and disagreement respectively, among responses of any author that had a strict ranking between the two papers for both questions.

https://doi.org/10.1371/journal.pone.0300710.g003

5.4 Agreements between co-authors, and between authors and peer-review decisions

This plot is based on 10,171 such responses. In particular, the first two bars enumerate the agreement and disagreement when the author-provided ranking is strict and where one of the papers is accepted and the other is rejected.

https://doi.org/10.1371/journal.pone.0300710.g004

This plot is based on 1,357 such responses. In particular, the first two bars enumerate the agreement and disagreement of co-authors when they both provide strict rankings of their papers.

https://doi.org/10.1371/journal.pone.0300710.g005

This high amount of disagreement between co-authors about the scientific contribution of their jointly authored papers has some implications for research on peer review. Many models of peer review [ 21 , 38 , 46 – 50 ] assume existence of some “true quality” of each paper. This result raises questions about such an assumption—if there were such a true quality, then it is perhaps the authors who would know them well at least in a relative sense, but as we saw above, authors do not seem to agree. In a recent work, [ 51 ] proposes a novel idea of asking each author to submit a ranking of their submitted papers. Under the assumption that this author-reported ranking is a gold standard, [ 51 ] then proposes to modify the review scores to align with this reported ranking. However, our observation that co-authors have a high disagreement about this ranking violates the gold standard assumption that underlies this proposal.

5.5 Change of perception

We now analyze the responses to the question posed to authors in the second phase of the experiment on whether the review process changed their perception of their own paper(s). We plot the results in Fig 6 . Given significant non-response bias in this phase with respect to acceptance decisions (Section 4), we also separately plot the responses pertaining to accepted and rejected papers.

The five bars in each plot represent the five options: much more positive (“++”), slightly more positive (“+”), did not change (“0”), slightly more negative (“-”), much more negative (“- -”). The three subfigures depict responses pertaining to all, accepted, and rejected papers, and are based on 4435, 1767, and 2668 such responses respectively. ( a ) All papers. ( b ) Accepted papers. ( c ) Rejected papers.

https://doi.org/10.1371/journal.pone.0300710.g006

We observe that among both accepted and rejected papers, about 50% of the responses indicated a change in their perceived opinion about their own papers. Furthermore, even among rejected papers, over 30% of responses mentioned that the reviews made their perception more positive. While past studies [ 11 , 17 – 19 ] document whether the review process helps improve the paper, the results in Fig 6 shows that it also results in a change of perception of authors about their papers about half the time.

6 Limitations and discussion

This work highlights the perception gap in the peer-review process, between authors, co-authors, and reviewers. Through surveys conducted in NeurIPS 2021, we found that authors considerably overestimated the chances of their papers getting accepted. Our analysis also shed light on the difference in estimation error across demographic-based subgroups. Next, we considered differences in perception across reviewers and authors to find that authors disagreed with peer-review decisions roughly 30% of the times, and co-authors disagreed with each other roughly 30% of the times. Finally, more than 30% of all survey respondents noted that their perception of their submission improved after the review process.

We discuss some key limitations. The 26.7% response rate in phase 1, and particularly the 12.3% response rate in phase 2, introduces concerns about non-response bias, in which non-respondents might have given different answers than respondents. We provide statistics pertaining to non-response bias in Section 4, and attempt to mitigate confounding with respect to the observables of demographics and paper outcomes (specifically, Section 5.2 and Section 5.5). However, importantly, only the observables cannot capture all the ways in which data may be missing not at random and this caveat ought be kept in mind in interpreting our results. A second limitation of this study is that respondents may not have been answering fully honestly. For example, if respondents believed that there was even a small chance their answers might leak to reviewers or co-authors, this would incentivize them to exaggerate the probability their paper would be accepted (an effect which would indeed be consistent with the pattern we observed). We took pains to mitigate this effect by assuring the authors of the privacy and security of their responses, and further, by asking them to not discuss their responses with others (see Appendix A).

These limitations notwithstanding, this study has several implications for improving the peer review process. First, the fact that authors vastly overestimated the probability their papers would be accepted suggests there is need for recalibration of expectations. Importantly, peer-review outcomes have been known to impact the graduate school experience of PhD students, with repeated rejections an oft-cited cause for worsening mental health [ 52 ]. We hope that the findings in this work will help in cultivating awareness among the student research community about their perceptions as a whole, and facilitate discussions between students and advisors about setting appropriate expectations from the peer-review process, thereby fostering a healthier relationship with their work.

The disagreements we document around paper quality—between co-authors as well as between authors and reviewers—suggest that, as previous work has also found, assessing paper quality is an extremely noisy process. A complementary study on the consistency of decisions made by independent committees of reviewers that was also run at NeurIPS 2021 also showed high levels of disagreement between reviewers [ 16 ]. Specifically, 10% of submitted papers were assigned to two independent committees (reviewers, area chairs, and senior area chairs) for review, and of these papers, the committees arrived at different acceptance decisions for 23%. While it may be tempting to attribute this disagreement solely to flaws in the peer-review process, if even co-authors—who know their own work as well as anyone—have significant disagreements on the ranking of their papers, perhaps it is fundamentally hard or impossible to objectively rank papers.

The outcomes of paper submissions should thus be taken with a grain of salt, mindful of the inherent randomness and arbitrariness of the process and the arguable lack of a fully objective notion of paper quality. Realizing that the rejections which generally follow paper submissions do not necessarily result from lack of merit, but rather just bad luck and subjectivity, would both be accurate and healthy for the academic community. More broadly, as a community, we may take these findings into account when deciding on our policies and perceptions pertaining to the peer-review process and its outcomes. We hope the results of our experiment encourage discussion and introspection in the community.

7 Appendices

A more details about the experiment.

In this section, we provide details about the experiment, augmenting the details provided in Section 3. First, we focus on the release timeline of the surveys. Then we provide details about the content of the surveys, including the instructions provided.

Timeline . Phase 1 of the experiment was conducted soon after the paper submission deadline in order to obtain authors’ perceptions of their submitted papers while the papers were still fresh on their minds. The paper submission deadline was on May 28, 2021. The Phase 1 survey was released shortly after, on June 1. Authors were invited to participate in the survey through June 11, after which the survey was closed. To increase participation in the survey, the program chairs sent a reminder email about the experiment on June 9.

Phase 2 of the experiment aimed at understanding the change in authors’ perception of their papers after receiving the initial reviews. The authors received the initial set of reviews on August 3, 2021 and were able to provide their rebuttal (response to the initial reviews) any time until August 10. We invited authors to participate in the Phase 2 survey on August 12. The peer review process was concluded on September 28, 2021, with the announcement of final decisions.

Instructions . In both the Phase 1 and Phase 2 surveys, authors were provided information regarding the privacy and confidentiality of their survey responses. They were informed that during the review process, only the authors themselves could view their responses, in addition to the administrators of OpenReview.net (the conference management platform used by NeurIPS 2021). It was emphasised that authors’ responses could not affect the outcome of the review process and that the responses would not be visible to their co-authors, reviewers, area chairs, or senior area chairs at any point of time. Regarding the analyses and following dissemination of the findings from the experiment, the survey mentioned that, “After the review process, the survey responses will be made available to the NeurIPS 2021 program chairs and Workflow chairs for statistical analyses. Any information shared publicly will be anonymized and only reported in an aggregated manner that protects your identities.” For the purposes of analysis, responses and profiles were accessed algorithmically via the OpenReview api. Further, authors were also told, “To allow authors to freely provide their opinions and keep samples as independent as possible, please do not discuss your answers to these survey questions with other NeurIPS 2021 authors (including your co-authors), or ask others about their responses.”

In Phase 1 of the experiment, we asked authors with multiple submissions to rank their submissions. The instructions for providing ranking were as follows: “Rank your papers in terms of your own perception of their scientific contributions to the NeurIPS community, if published in their current form. Rank 1 indicates the paper with the greatest scientific contribution; ties are allowed, but please use them sparingly. In the table entry for each submission below, there is a pull-down menu called “Paper Ranking.” Please click on it and specify the rank for that submission.”

Finally, among the 6237 authors with multiple submissions, 32 authors (0.5%) provided a ranking for only one of their submissions. We exclude these responses from the analysis of the ranking.

B More details about demographic analysis

In this section, we provide details about the analyses we conduct to test for significant difference in calibration error across demographic groups in Section 5.2. To describe the analysis, we first define some notation. Let n denote the total number of responses obtained in Phase 1 of our experiment. We will use i as an index over responses, where each response pertains to a single author-paper pair. For response i , let p i ∈ [0, 1] be the acceptance probability indicated by the author. The observed outcome of the associated paper is a binary indicator, denoted by y i ∈ {0, 1}, where y i = 1 if the paper is accepted and y i = 0 if it is rejected. The self-reported gender of the associated author is denoted by g i ∈ G ≔ {Female, Male, Other, Unspecified}. Note that there are responses where the associated authors did not provide a gender in their Open Review profile. All authors’ seniority is classified into three types based on their reviewing participation, denoted by s i ∈ S ≔ {Meta-reviewer, Reviewer, Neither}.

Finally, we include the geographical region associated with the author, denoted by r i . To assign a geographical region to each author, we use the institutional domain of the author’s primary affiliation. We classify the geographical regions using the geographical region division provided by the United Nations Statistics Division (UNSD). Within their division of regions, we further break each region with more than 100 responses in our survey into sub-regions listed by UNSD. This yields the following set of regions denoted by R ≔ {Africa, North America, Latin America and the Caribbean, Central Asia, Eastern Asia, South-eastern Asia, Southern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Oceania}.

Acknowledgments

We would like to thank all the participants for the time they took to provide survey responses. We are grateful to the OpenReview team, especially Melisa Bok, for their support in running the survey on the OpenReview.net platform.

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You Don’t Just See a Total Solar Eclipse. You Feel It Completely.

By Ryan Milligan

Dr. Milligan is a senior lecturer in astrophysics at Queen’s University in Belfast, Northern Ireland.

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It may sound absurd, but there is no other celestial event that anyone I know would devote so much time and effort to seeing. If you wish to see the northern lights, you can hop on a plane to Iceland or Norway and have a fairly decent chance of seeing them in the winter months. If you are on the nightside of the planet during a lunar eclipse and the skies are clear, you just need to go outside and look up to see it happening. But unless you are fortunate enough to live within or close to the path of totality, witnessing a total solar eclipse will probably require meticulous planning and marshaling time and money to get you to an optimal location and a bit of luck to make sure the weather forecasts you’ve pored over hold true.

Believe me, it is worth the effort.

A total solar eclipse is not something that you see — it’s something that you experience. You can feel the temperature around you begin to drop by as much as 15 degrees over the five to 10 minutes that lead up to the eclipse. The birds and other animals go silent. The light becomes eerie and morphs into a dusky, muted twilight, and you begin to see stark, misplaced shadows abound. A column of darkness in the sky hurtles toward you at over 1,000 miles per hour as the moon’s shadow falls neatly over the sun, turning day into temporary night — nothing like the calming sunset we take for granted every day. Sometimes, a few stars or planets begin to appear faintly in the sky as your eyes get used to the new darkness.

The hairs stand up on the back of your neck and the adrenaline kicks in as your brain tries to make sense of what is going on. But it cannot. It has no other point of reference to compare these sensations to. A total eclipse elicits a unique, visceral, primeval feeling that cannot be evoked by a photograph or a video or a newspaper article, and that can be experienced only within the path of totality when the moon completely obscures the disk of the sun.

And then of course there is the crowning glory: the sun’s corona, the pearly white outer atmosphere of our nearest star that we can otherwise see only using a fleet of dedicated solar-observing spacecraft. It has an ethereal beauty that is challenging to articulate.

For those brief few moments when the corona appears bright in the sky, all the effort made to experience the totality becomes worth it. You want to soak up every second of it and process every feeling, because it is over all too soon. Once the moon’s shadow has passed you feel both exhilarated and deflated because the next opportunity to experience this sensation again could be years away and on the other side of the world. And it is something that you will crave.

There is also, of course, the professional motivation for me to gaze upon the subject of my research with my own eyes. Most other astrophysicists only get to look at exploding stars or distant comets through gargantuan telescopes, where they appear as mere pixels on a computer screen or a squiggle on a graph. It’s easy to get detached from the beauty of astronomy when your job becomes more focused on securing grant funding, teaching, administrative duties and bureaucracy. Eclipse chasing reminds me why I chose this field of work in the first place and reignites my passion — and I want to inspire my students with that same passion.

Each eclipse is different. The shape and structure of the solar corona varies over the course of each solar cycle. The longer the duration of the eclipse, the darker one’s surroundings are likely to seem. And sandwiched between the sun’s “surface” and the corona is the crimson red chromosphere, the layer of the sun’s atmosphere that I have been researching for almost 20 years to understand its relationship to solar flares. In Australia the briefness of totality meant that this region was exceptionally bright and distinguished, and one could even spot some solar prominences (clouds of hydrogen gas suspended above the chromosphere) with the naked eye. That may also be the case on Monday.

People mistakenly think that a partial eclipse is good enough. It is not. When outside the path of totality, the visibility of even 1 percent of the sun’s disk is enough to outshine the entire corona. The buzz around this year’s eclipse through North America has reached a fever pitch not seen since the “Great American Eclipse” of 2017. The duration of totality will be almost twice as long — almost four and a half minutes. (Whether the weather will cooperate is still an open question .)

This is far from the first time I’ve tried to cajole people into experiencing the totality in full. In 2017, I persuaded several of my friends in the United States to join me in Nebraska to enjoy the spectacle without forcing them to traipse halfway across the globe. They later told me that they at first thought I may have been somewhat exaggerating the experience because of my professional bias, but when the eclipse was over, I knew that they finally got it. Their faces were overcome with emotion and they struggled to articulate how they were feeling. Because it wasn’t just about what they had seen — it was about what they had experienced.

Ryan Milligan is a solar physicist at Queen’s University in Belfast, Northern Ireland. He has held research fellowships at NASA and the Science and Technology Facilities Council in Britain and was affiliated with NASA’s Goddard Space Flight Center for over a decade.

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What is the difference between a solar eclipse and a lunar eclipse?

It almost time! Millions of Americans across the country Monday are preparing to witness the once-in-a-lifetime total solar eclipse as it passes over portions of Mexico, the United States and Canada.

It's a sight to behold and people have now long been eagerly awaiting what will be their only chance until 2044 to witness totality, whereby the moon will completely block the sun's disc, ushering in uncharacteristic darkness.

That being said, many are curious on what makes the solar eclipse special and how is it different from a lunar eclipse.

The total solar eclipse is today: Get the latest forecast and everything you need to know

What is an eclipse?

An eclipse occurs when any celestial object like a moon or a planet passes between two other bodies, obscuring the view of objects like the sun, according to NASA .

What is a solar eclipse?

A total solar eclipse occurs when the moon comes in between the Earth and the sun, blocking its light from reaching our planet, leading to a period of darkness lasting several minutes. The resulting "totality," whereby observers can see the outermost layer of the sun's atmosphere, known as the corona, presents a spectacular sight for viewers and confuses animals – causing nocturnal creatures to stir and bird and insects to fall silent.

Partial eclipses, when some part of the sun remains visible, are the most common, making total eclipses a rare sight.

What is a lunar eclipse?

A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. When this happens, Earth blocks the sunlight that normally reaches the moon. Instead of that sunlight hitting the moon’s surface, Earth's shadow falls on it.

Lunar eclipses are often also referred to the "blood moon" because when the Earth's shadow covers the moon, it often produces a red color. The coloration happens because a bit of reddish sunlight still reaches the moon's surface, even though it's in Earth's shadow.

Difference between lunar eclipse and solar eclipse

The major difference between the two eclipses is in the positioning of the sun, the moon and the Earth and the longevity of the phenomenon, according to NASA.

A lunar eclipse can last for a few hours, while a solar eclipse lasts only a few minutes. Solar eclipses also rarely occur, while lunar eclipses are comparatively more frequent. While at least two partial lunar eclipses happen every year, total lunar eclipses are still rare, says NASA.

Another major difference between the two is that for lunar eclipses, no special glasses or gizmos are needed to view the spectacle and one can directly stare at the moon. However, for solar eclipses, it is pertinent to wear proper viewing glasses and take the necessary safety precautions because the powerful rays of the sun can burn and damage your retinas.

Contributing: Eric Lagatta, Doyle Rice, USA TODAY