plagiarism research paper

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A publication of the harvard college writing program.

Harvard Guide to Using Sources

The Honor Code
What Constitutes Plagiarism?

In academic writing, it is considered plagiarism to draw any idea or any language from someone else without adequately crediting that source in your paper. It doesn't matter whether the source is a published author, another student, a website without clear authorship, a website that sells academic papers, or any other person: Taking credit for anyone else's work is stealing, and it is unacceptable in all academic situations, whether you do it intentionally or by accident.

The ease with which you can find information of all kinds online means that you need to be extra vigilant about keeping track of where you are getting information and ideas and about giving proper credit to the authors of the sources you use. If you cut and paste from an electronic document into your notes and forget to clearly label the document in your notes, or if you draw information from a series of websites without taking careful notes, you may end up taking credit for ideas that aren't yours, whether you mean to or not.

It's important to remember that every website is a document with an author, and therefore every website must be cited properly in your paper. For example, while it may seem obvious to you that an idea drawn from Professor Steven Pinker's book The Language Instinct should only appear in your paper if you include a clear citation, it might be less clear that information you glean about language acquisition from the Stanford Encyclopedia of Philosophy website warrants a similar citation. Even though the authorship of this encyclopedia entry is less obvious than it might be if it were a print article (you need to scroll down the page to see the author's name, and if you don't do so you might mistakenly think an author isn't listed), you are still responsible for citing this material correctly. Similarly, if you consult a website that has no clear authorship, you are still responsible for citing the website as a source for your paper. The kind of source you use, or the absence of an author linked to that source, does not change the fact that you always need to cite your sources (see Evaluating Web Sources ).

Verbatim Plagiarism

If you copy language word for word from another source and use that language in your paper, you are plagiarizing verbatim . Even if you write down your own ideas in your own words and place them around text that you've drawn directly from a source, you must give credit to the author of the source material, either by placing the source material in quotation marks and providing a clear citation, or by paraphrasing the source material and providing a clear citation.

The passage below comes from Ellora Derenoncourt’s article, “Can You Move to Opportunity? Evidence from the Great Migration.”

Here is the article citation in APA style:

Derenoncourt, E. (2022). Can you move to opportunity? Evidence from the Great Migration. The American Economic Review , 112(2), 369–408. https://doi.org/10.1257/aer.20200002

Source material

Why did urban Black populations in the North increase so dramatically between 1940 and 1970? After a period of reduced mobility during the Great Depression, Black out-migration from the South resumed at an accelerated pace after 1940. Wartime jobs in the defense industry and in naval shipyards led to substantial Black migration to California and other Pacific states for the first time since the Migration began. Migration continued apace to midwestern cities in the 1950s and1960s, as the booming automobile industry attracted millions more Black southerners to the North, particularly to cities like Detroit or Cleveland. Of the six million Black migrants who left the South during the Great Migration, four million of them migrated between 1940 and 1970 alone.

Plagiarized version

While this student has written her own sentence introducing the topic, she has copied the italicized sentences directly from the source material. She has left out two sentences from Derenoncourt’s paragraph, but has reproduced the rest verbatim:

But things changed mid-century. After a period of reduced mobility during the Great Depression, Black out-migration from the South resumed at an accelerated pace after 1940. Wartime jobs in the defense industry and in naval shipyards led to substantial Black migration to California and other Pacific states for the first time since the Migration began. Migration continued apace to midwestern cities in the 1950s and1960s, as the booming automobile industry attracted millions more Black southerners to the North, particularly to cities like Detroit or Cleveland.

Acceptable version #1: Paraphrase with citation

In this version the student has paraphrased Derenoncourt’s passage, making it clear that these ideas come from a source by introducing the section with a clear signal phrase ("as Derenoncourt explains…") and citing the publication date, as APA style requires.

But things changed mid-century. In fact, as Derenoncourt (2022) explains, the wartime increase in jobs in both defense and naval shipyards marked the first time during the Great Migration that Black southerners went to California and other west coast states. After the war, the increase in jobs in the car industry led to Black southerners choosing cities in the midwest, including Detroit and Cleveland.

Acceptable version #2 : Direct quotation with citation or direct quotation and paraphrase with citation

If you quote directly from an author and cite the quoted material, you are giving credit to the author. But you should keep in mind that quoting long passages of text is only the best option if the particular language used by the author is important to your paper. Social scientists and STEM scholars rarely quote in their writing, paraphrasing their sources instead. If you are writing in the humanities, you should make sure that you only quote directly when you think it is important for your readers to see the original language.

In the example below, the student quotes part of the passage and paraphrases the rest.

But things changed mid-century. In fact, as Derenoncourt (2022) explains, “after a period of reduced mobility during the Great Depression, Black out-migration from the South resumed at an accelerated pace after 1940” (p. 379). Derenoncourt notes that after the war, the increase in jobs in the car industry led to Black southerners choosing cities in the midwest, including Detroit and Cleveland.

Mosaic Plagiarism

If you copy bits and pieces from a source (or several sources), changing a few words here and there without either adequately paraphrasing or quoting directly, the result is mosaic plagiarism . Even if you don't intend to copy the source, you may end up with this type of plagiarism as a result of careless note-taking and confusion over where your source's ideas end and your own ideas begin. You may think that you've paraphrased sufficiently or quoted relevant passages, but if you haven't taken careful notes along the way, or if you've cut and pasted from your sources, you can lose track of the boundaries between your own ideas and those of your sources. It's not enough to have good intentions and to cite some of the material you use. You are responsible for making clear distinctions between your ideas and the ideas of the scholars who have informed your work. If you keep track of the ideas that come from your sources and have a clear understanding of how your own ideas differ from those ideas, and you follow the correct citation style, you will avoid mosaic plagiarism.

Indeed, of the more than 3500 hours of instruction during medical school, an average of less than 60 hours are devoted to all of bioethics, health law and health economics combined . Most of the instruction is during the preclinical courses, leaving very little instructional time when students are experiencing bioethical or legal challenges during their hands-on, clinical training. More than 60 percent of the instructors in bioethics, health law, and health economics have not published since 1990 on the topic they are teaching.

--Persad, G.C., Elder, L., Sedig,L., Flores, L., & Emanuel, E. (2008). The current state of medical school education in bioethics, health law, and health economics. Journal of Law, Medicine, and Ethics 36 , 89-94.

Students can absorb the educational messages in medical dramas when they view them for entertainment. In fact, even though they were not created specifically for education, these programs can be seen as an entertainment-education tool [43, 44]. In entertainment-education shows, viewers are exposed to educational content in entertainment contexts, using visual language that is easy to understand and triggers emotional engagement [45]. The enhanced emotional engagement and cognitive development [5] and moral imagination make students more sensitive to training [22].

--Cambra-Badii, I., Moyano, E., Ortega, I., Josep-E Baños, & Sentí, M. (2021). TV medical dramas: Health sciences students’ viewing habits and potential for teaching issues related to bioethics and professionalism. BMC Medical Education, 21 , 1-11. doi: https://doi.org/10.1186/s12909-021-02947-7

Paragraph #1.

All of the ideas in this paragraph after the first sentence are drawn directly from Persad. But because the student has placed the citation mid-paragraph, the final two sentences wrongly appear to be the student’s own idea:

In order to advocate for the use of medical television shows in the medical education system, it is also important to look at the current bioethical curriculum. In the more than 3500 hours of training that students undergo in medical school, only about 60 hours are focused on bioethics, health law, and health economics (Persad et al, 2008). It is also problematic that students receive this training before they actually have spent time treating patients in the clinical setting. Most of these hours are taught by instructors without current publications in the field.

Paragraph #2.

All of the italicized ideas in this paragraph are either paraphrased or taken verbatim from Cambra-Badii, et al., but the student does not cite the source at all. As a result, readers will assume that the student has come up with these ideas himself:

Students can absorb the educational messages in medical dramas when they view them for entertainment. It doesn’t matter if the shows were designed for medical students; they can still be a tool for education. In these hybrid entertainment-education shows, viewers are exposed to educational content that triggers an emotional reaction. By allowing for this emotional, cognitive, and moral engagement, the shows make students more sensitive to training . There may be further applications to this type of education: the role of entertainment as a way of encouraging students to consider ethical situations could be extended to other professions, including law or even education.

The student has come up with the final idea in the paragraph (that this type of ethical training could apply to other professions), but because nothing in the paragraph is cited, it reads as if it is part of a whole paragraph of his own ideas, rather than the point that he is building to after using the ideas from the article without crediting the authors.

Acceptable version

In the first paragraph, the student uses signal phrases in nearly every sentence to reference the authors (“According to Persad et al.,” “As the researchers argue,” “They also note”), which makes it clear throughout the paragraph that all of the paragraph’s information has been drawn from Persad et al. The student also uses a clear APA in-text citation to point the reader to the original article. In the second paragraph, the student paraphrases and cites the source’s ideas and creates a clear boundary behind those ideas and his own, which appear in the final paragraph.

In order to advocate for the use of medical television shows in the medical education system, it is also important to look at the current bioethical curriculum. According to Persad et al. (2008), only about one percent of teaching time throughout the four years of medical school is spent on ethics. As the researchers argue, this presents a problem because the students are being taught about ethical issues before they have a chance to experience those issues themselves. They also note that more than sixty percent of instructors teaching bioethics to medical students have no recent publications in the subject.

The research suggests that medical dramas may be a promising source for discussions of medical ethics. Cambra-Badii et al. (2021) explain that even when watched for entertainment, medical shows can help viewers engage emotionally with the characters and may prime them to be more receptive to training in medical ethics. There may be further applications to this type of education: the role of entertainment as a way of encouraging students to consider ethical situations could be extended to other professions, including law or even education.

Inadequate Paraphrase

When you paraphrase, your task is to distill the source's ideas in your own words. It's not enough to change a few words here and there and leave the rest; instead, you must completely restate the ideas in the passage in your own words. If your own language is too close to the original, then you are plagiarizing, even if you do provide a citation.

In order to make sure that you are using your own words, it's a good idea to put away the source material while you write your paraphrase of it. This way, you will force yourself to distill the point you think the author is making and articulate it in a new way. Once you have done this, you should look back at the original and make sure that you have represented the source’s ideas accurately and that you have not used the same words or sentence structure. If you do want to use some of the author's words for emphasis or clarity, you must put those words in quotation marks and provide a citation.

The passage below comes from Michael Sandel’s article, “The Case Against Perfection.” Here’s the article citation in MLA style:

Sandel, Michael. “The Case Against Perfection.” The Atlantic , April 2004, https://www.theatlantic.com/magazine/archive/2004/04/the-case-against-pe... .

Though there is much to be said for this argument, I do not think the main problem with enhancement and genetic engineering is that they undermine effort and erode human agency. The deeper danger is that they represent a kind of hyperagency—a Promethean aspiration to remake nature, including human nature, to serve our purposes and satisfy our desires. The problem is not the drift to mechanism but the drive to mastery. And what the drive to mastery misses and may even destroy is an appreciation of the gifted character of human powers and achievements.

The version below is an inadequate paraphrase because the student has only cut or replaced a few words: “I do not think the main problem” became “the main problem is not”; “deeper danger” became “bigger problem”; “aspiration” became “desire”; “the gifted character of human powers and achievements” became “the gifts that make our achievements possible.”

The main problem with enhancement and genetic engineering is not that they undermine effort and erode human agency. The bigger problem is that they represent a kind of hyperagency—a Promethean desire to remake nature, including human nature, to serve our purposes and satisfy our desires. The problem is not the drift to mechanism but the drive to mastery. And what the drive to mastery misses and may even destroy is an appreciation of the gifts that make our achievements possible (Sandel).

Acceptable version #1: Adequate paraphrase with citation

In this version, the student communicates Sandel’s ideas but does not borrow language from Sandel. Because the student uses Sandel’s name in the first sentence and has consulted an online version of the article without page numbers, there is no need for a parenthetical citation.

Michael Sandel disagrees with the argument that genetic engineering is a problem because it replaces the need for humans to work hard and make their own choices. Instead, he argues that we should be more concerned that the decision to use genetic enhancement is motivated by a desire to take control of nature and bend it to our will instead of appreciating its gifts.

Acceptable version #2: Direct quotation with citation

In this version, the student uses Sandel’s words in quotation marks and provides a clear MLA in-text citation. In cases where you are going to talk about the exact language that an author uses, it is acceptable to quote longer passages of text. If you are not going to discuss the exact language, you should paraphrase rather than quoting extensively.

The author argues that “the main problem with enhancement and genetic engineering is not that they undermine effort and erode human agency,” but, rather that “they represent a kind of hyperagency—a Promethean desire to remake nature, including human nature, to serve our purposes and satisfy our desires. The problem is not the drift to mechanism but the drive to mastery. And what the drive to mastery misses and may even destroy is an appreciation of the gifts that make our achievements possible” (Sandel).

Uncited Paraphrase

When you use your own language to describe someone else's idea, that idea still belongs to the author of the original material. Therefore, it's not enough to paraphrase the source material responsibly; you also need to cite the source, even if you have changed the wording significantly. As with quoting, when you paraphrase you are offering your reader a glimpse of someone else's work on your chosen topic, and you should also provide enough information for your reader to trace that work back to its original form. The rule of thumb here is simple: Whenever you use ideas that you did not think up yourself, you need to give credit to the source in which you found them, whether you quote directly from that material or provide a responsible paraphrase.

The passage below comes from C. Thi Nguyen’s article, “Echo Chambers and Epistemic Bubbles.”

Here’s the citation for the article, in APA style:

Nguyen, C. (2020). Echo chambers and epistemic bubbles. Episteme, 17 (2), 141-161. doi:10.1017/epi.2018.32

Epistemic bubbles can easily form accidentally. But the most plausible explanation for the particular features of echo chambers is something more malicious. Echo chambers are excellent tools to maintain, reinforce, and expand power through epistemic control. Thus, it is likely (though not necessary) that echo chambers are set up intentionally, or at least maintained, for this functionality (Nguyen, 2020).

The student who wrote the paraphrase below has drawn these ideas directly from Nguyen’s article but has not credited the author. Although she paraphrased adequately, she is still responsible for citing Nguyen as the source of this information.

Echo chambers and epistemic bubbles have different origins. While epistemic bubbles can be created organically, it’s more likely that echo chambers will be formed by those who wish to keep or even grow their control over the information that people hear and understand.

In this version, the student eliminates any possible ambiguity about the source of the ideas in the paragraph. By using a signal phrase to name the author whenever the source of the ideas could be unclear, the student clearly attributes these ideas to Nguyen.

According to Nguyen (2020), echo chambers and epistemic bubbles have different origins. Nguyen argues that while epistemic bubbles can be created organically, it’s more likely that echo chambers will be formed by those who wish to keep or even grow their control over the information that people hear and understand.

Uncited Quotation

When you put source material in quotation marks in your essay, you are telling your reader that you have drawn that material from somewhere else. But it's not enough to indicate that the material in quotation marks is not the product of your own thinking or experimentation: You must also credit the author of that material and provide a trail for your reader to follow back to the original document. This way, your reader will know who did the original work and will also be able to go back and consult that work if they are interested in learning more about the topic. Citations should always go directly after quotations.

The passage below comes from Deirdre Mask’s nonfiction book, The Address Book: What Street Addresses Reveal About Identity, Race, Wealth, and Power.

Here is the MLA citation for the book:

Mask, Deirdre. The Address Book: What Street Addresses Reveal About Identity, Race, Wealth, and Power. St. Martin’s Griffin, 2021.

In New York, even addresses are for sale. The city allows a developer, for the bargain price of $11,000 (as of 2019), to apply to change the street address to something more attractive.

It’s not enough for the student to indicate that these words come from a source; the source must be cited:

After all, “in New York, even addresses are for sale. The city allows a developer, for the bargain price of $11,000 (as of 2019), to apply to change the street address to something more attractive.”

Here, the student has cited the source of the quotation using an MLA in-text citation:

Using Material from Another Student's Work

In some courses you will be allowed or encouraged to form study groups, to work together in class generating ideas, or to collaborate on your thinking in other ways. Even in those cases, it's imperative that you understand whether all of your writing must be done independently, or whether group authorship is permitted. Most often, even in courses that allow some collaborative discussion, the writing or calculations that you do must be your own. This doesn't mean that you shouldn't collect feedback on your writing from a classmate or a writing tutor; rather, it means that the argument you make (and the ideas you rely on to make it) should either be your own or you should give credit to the source of those ideas.

So what does this mean for the ideas that emerge from class discussion or peer review exercises? Unlike the ideas that your professor offers in lecture (you should always cite these), ideas that come up in the course of class discussion or peer review are collaborative, and often not just the product of one individual's thinking. If, however, you see a clear moment in discussion when a particular student comes up with an idea, you should cite that student. In any case, when your work is informed by class discussions, it's courteous and collegial to include a discursive footnote in your paper that lets your readers know about that discussion. So, for example, if you were writing a paper about the narrator in Tim O'Brien's The Things They Carried and you came up with your idea during a discussion in class, you might place a footnote in your paper that states the following: "I am indebted to the members of my Expos 20 section for sparking my thoughts about the role of the narrator as Greek Chorus in Tim O'Brien's The Things They Carried ."

It is important to note that collaboration policies can vary by course, even within the same department, and you are responsible for familiarizing yourself with each course's expectation about collaboration. Collaboration policies are often stated in the syllabus, but if you are not sure whether it is appropriate to collaborate on work for any course, you should always consult your instructor.

The Exception: Common Knowledge
Other Scenarios to Avoid
Why Does it Matter if You Plagiarize?
How to Avoid Plagiarism
Harvard University Plagiarism Policy

PDFs for This Section

Avoiding Plagiarism
Online Library and Citation Tools

How to Avoid Plagiarism in Research Papers (Part 1)

Writing a research paper poses challenges in gathering literature and providing evidence for making your paper stronger. Drawing upon previously established ideas and values and adding pertinent information in your paper are necessary steps, but these need to be done with caution without falling into the trap of plagiarism . In order to understand how to avoid plagiarism , it is important to know the different types of plagiarism that exist.

What is Plagiarism in Research?

Plagiarism is the unethical practice of using words or ideas (either planned or accidental) of another author/researcher or your own previous works without proper acknowledgment. Considered as a serious academic and intellectual offense, plagiarism can result in highly negative consequences such as paper retractions and loss of author credibility and reputation. It is currently a grave problem in academic publishing and a major reason for paper retractions .

It is thus imperative for researchers to increase their understanding about plagiarism. In some cultures, academic traditions and nuances may not insist on authentication by citing the source of words or ideas. However, this form of validation is a prerequisite in the global academic code of conduct. Non-native English speakers face a higher challenge of communicating their technical content in English as well as complying with ethical rules. The digital age too affects plagiarism. Researchers have easy access to material and data on the internet which makes it easy to copy and paste information.

Related: Conducting literature survey and wish to learn more about scientific misconduct? Check out this resourceful infographic today!

How Can You Avoid Plagiarism in a Research Paper?

Guard yourself against plagiarism, however accidental it may be. Here are some guidelines to avoid plagiarism.

1. Paraphrase your content

Do not copy–paste the text verbatim from the reference paper. Instead, restate the idea in your own words.
Understand the idea(s) of the reference source well in order to paraphrase correctly.
Examples on good paraphrasing can be found here ( https://writing.wisc.edu/Handbook/QPA_paraphrase.html )

2. Use Quotations

Use quotes to indicate that the text has been taken from another paper. The quotes should be exactly the way they appear in the paper you take them from.

3. Cite your Sources – Identify what does and does not need to be cited

The best way to avoid the misconduct of plagiarism is by self-checking your documents using plagiarism checker tools.
Any words or ideas that are not your own but taken from another paper need to be cited .
Cite Your Own Material—If you are using content from your previous paper, you must cite yourself. Using material you have published before without citation is called self-plagiarism .
The scientific evidence you gathered after performing your tests should not be cited.
Facts or common knowledge need not be cited. If unsure, include a reference.

4. Maintain records of the sources you refer to

Maintain records of the sources you refer to. Use citation software like EndNote or Reference Manager to manage the citations used for the paper
Use multiple references for the background information/literature survey. For example, rather than referencing a review, the individual papers should be referred to and cited.

5. Use plagiarism checkers

You can use various plagiarism detection tools such as iThenticate or HelioBLAST (formerly eTBLAST) to see how much of your paper is plagiarised .

Tip: While it is perfectly fine to survey previously published work, it is not alright to paraphrase the same with extensive similarity. Most of the plagiarism occurs in the literature review section of any document (manuscript, thesis, etc.). Therefore, if you read the original work carefully, try to understand the context, take good notes, and then express it to your target audience in your own language (without forgetting to cite the original source), then you will never be accused with plagiarism (at least for the literature review section).

Caution: The above statement is valid only for the literature review section of your document. You should NEVER EVER use someone else’s original results and pass them off as yours!

What strategies do you adopt to maintain content originality? What advice would you share with your peers? Please feel free to comment in the section below.

If you would like to know more about patchwriting, quoting, paraphrasing and more, read the next article in this series!

Nice!! This article gives ideas to avoid plagiarism in a research paper and it is important in a research paper.

the article is very useful to me as a starter in research…thanks a lot!

it’s educative. what a wonderful article to me, it serves as a road map to avoid plagiarism in paper writing. thanks, keep your good works on.

I think this is very important topic before I can proceed with my M.A

it is easy to follow and understand

Nice!! These articles provide clear instructions on how to avoid plagiarism in research papers along with helpful tips.

Amazing and knowledgeable notes on plagiarism

Very helpful and educative, I have easily understood everything. Thank you so much.

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Citing Sources

How to Avoid Plagiarism
Introduction
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Best Practices for Avoiding Plagiarism

The entire section below came from a research guide from Iowa State University. To avoid plagiarism, one must provide a reference to that source to indicate where the original information came from (see the "Source:" section below).

"There are many ways to avoid plagiarism, including developing good research habits, good time management, and taking responsibility for your own learning. Here are some specific tips:

Don't procrastinate with your research and assignments. Good research takes time. Procrastinating makes it likely you'll run out of time or be unduly pressured to finish. This sort of pressure can often lead to sloppy research habits and bad decisions. Plan your research well in advance, and seek help when needed from your professor, from librarians and other campus support staff.
Commit to doing your own work. If you don't understand an assignment, talk with your professor. Don't take the "easy way" out by asking your roommate or friends for copies of old assignments. A different aspect of this is group work. Group projects are very popular in some classes on campus, but not all. Make sure you clearly understand when your professor says it's okay to work with others on assignments and submit group work on assignments, versus when assignments and papers need to represent your own work.
Be 100% scrupulous in your note taking. As you prepare your paper or research, and as you begin drafting your paper. One good practice is to clearly label in your notes your own ideas (write "ME" in parentheses) and ideas and words from others (write "SMITH, 2005" or something to indicate author, source, source date). Keep good records of the sources you consult, and the ideas you take from them. If you're writing a paper, you'll need this information for your bibliographies or references cited list anyway, so you'll benefit from good organization from the beginning.
Cite your sources scrupulously. Always cite other people's work, words, ideas and phrases that you use directly or indirectly in your paper. Regardless of whether you found the information in a book, article, or website, and whether it's text, a graphic, an illustration, chart or table, you need to cite it. When you use words or phrases from other sources, these need to be in quotes. Current style manuals are available at most reference desks and online. They may also give further advice on avoiding plagiarism.
Understand good paraphrasing. Simply using synonyms or scrambling an author's words and phrases and then using these "rewrites" uncredited in your work is plagiarism, plain and simple. Good paraphrasing requires that you genuinely understand the original source, that you are genuinely using your own words to summarize a point or concept, and that you insert in quotes any unique words or phrases you use from the original source. Good paraphrasing also requires that you cite the original source. Anything less and you veer into the dangerous territory of plagiarism."

Source: Vega García, S.A. (2012). Understanding plagiarism: Information literacy guide. Iowa State University. Retrieved from http://instr.iastate.libguides.com/content.php?pid=10314 . [Accessed January 3, 2017]

Plagiarism prevention.

Plagiarism Prevention (onlinecolleges.net) This resource provides information about preventing plagiarism, understanding the various types of plagiarism, and learning how to cite properly to avoid plagiarism.

UCLA has a campuswide license to Turnitin.com. Faculty may turn in student papers electronically, where the text can be compared with a vast database of other student papers, online articles, general Web pages, and other sources. Turnitin.com then produces a report for the instructor indicating whether the paper was plagiarized and if so, how much.

For more information, go to Turnitin.com .