Dealing With Plagiarism in a Literature Review: Causes and Solutions (2026)

Plagiarism in a literature review is more difficult to avoid than in other sections of a research paper. The literature review requires you to read, synthesize, and represent dozens of other authors’ ideas — which creates constant friction between summarising accurately and writing in your own voice. This article explains why plagiarism happens in literature reviews, what forms it takes, and how to handle it systematically.

Why Literature Reviews Are High-Risk for Plagiarism

In a methods section or results section, the content is largely original — you’re describing what you did. A literature review is different: its entire purpose is to represent what others have done. This creates three specific risks:

• Volume pressure: Reviewing 40–80 sources under deadline makes careful paraphrasing feel impractical. Writers lean on copying as a shortcut.
• Heavy paraphrasing errors: Changing a few words while keeping the original sentence structure — sometimes called “patchwriting” — is still plagiarism even if no direct quote marks are used.
• Mosaic plagiarism: Taking phrases from multiple sources and weaving them together without quotation marks. No single sentence is copied verbatim, but the passage is assembled from borrowed language.

The Four Types of Plagiarism in Literature Reviews

1. Direct Copy-Paste

The most obvious form: lifting sentences or paragraphs verbatim without quotation marks. Turnitin and iThenticate flag this immediately. It’s also the easiest to avoid — use quotation marks or rewrite completely.

2. Patchwriting (Near-Paraphrase)

Example — Original: “The lack of standardisation in reporting frameworks remains the primary barrier to cross-study comparisons.”

Patchwrite: “The absence of standardisation in reporting frameworks remains the main obstacle to comparing studies across fields.”

The structure is identical, only a few words changed. Plagiarism checkers often flag this at lower similarity scores, but supervisors and examiners recognise it. Rewrite the idea entirely, using your own sentence structure.

3. Mosaic Plagiarism

Example: A paragraph where each sentence paraphrases a different source, but the sentence structure, argument flow, and phrasing are borrowed from the originals. No single sentence matches any one source, so a similarity checker may score it low — but the intellectual content isn’t yours.

The fix is synthesis: rather than paraphrasing sources in sequence, group ideas by theme and write your own analysis comparing them.

4. Uncited Paraphrase

You accurately rewrote a source in your own words — but forgot to add the in-text citation. This is plagiarism even though the language is original, because you’re presenting someone else’s idea without attribution. Add the citation.

How to Deal With Plagiarism in a Literature Review You’ve Already Written

If you’ve run a similarity check and found a high match score in your literature review, work through these steps:

Step 1: Identify the Source of Each Match

Open the similarity report and trace each highlighted passage back to its source. Categorise each as: direct quote (needs marks + citation), patchwrite (needs full rewrite), or correctly cited paraphrase (may just need minor adjustment).

Step 2: Rewrite Patchwritten Passages from Scratch

Close the source document. Write a fresh sentence expressing the idea in your own words, then check it against the original — if your structure still mirrors theirs, rewrite again. The goal is to understand the idea, then explain it independently.

Step 3: Add Missing Citations

Any idea that originated from a source needs an in-text citation, even when fully rewritten. If you paraphrased without citing, add the citation immediately — don’t assume that changed wording removes the obligation to attribute.

Step 4: Synthesise Rather Than Sequence

If your literature review reads as “Smith (2018) said X. Jones (2019) said Y. Kumar (2020) said Z,” you’re summarising sources rather than synthesising them. Restructure around themes or arguments: “Three studies examined X, reaching different conclusions: [comparison]. The dominant view is [position], though [limitation] remains unresolved.”

Step 5: Re-run the Check Before Submission

After revisions, recheck with the same tool. A score under 15–20% (with no individual source matching more than 5%) is generally considered acceptable, though your institution may have different thresholds. Check your programme’s handbook for the exact guideline.

Using Quotations Correctly in Literature Reviews

Direct quotations should be rare in a literature review — the standard is to paraphrase and synthesise, not quote. Use direct quotation only when the exact wording carries specific meaning (a definition, a coined term, a particularly precise claim). When you do quote:

• Use quotation marks for fewer than 40 words (APA standard; MLA uses 4+ lines for block quotes)
• For 40+ words (APA), use a block quote — indented, no quotation marks
• Always include author, year, and page number (or paragraph number for online sources)

Prevention: Building a Clean Literature Review Process

• Take notes in your own words: When reading a source, close it and write what you understood — don’t copy sentences into your notes file.
• Use annotation software: Tools like Zotero, Mendeley, or Notion let you tag and group ideas by theme — making synthesis easier than sequencing.
• Track sources rigorously: Every note should be tagged with the source’s citation so you never lose track of where an idea came from.
• Write in sprints away from sources: Draft the literature review from your notes and memory, then verify facts against sources during editing — not while writing.

Dealing with plagiarism in a literature review comes down to understanding its root cause: writing too close to the source. Distance yourself from the original language, synthesise ideas rather than sequence them, and cite everything that isn’t your own analysis. If your literature review has significant similarity issues, consider a professional plagiarism removal service to get a specialist assessment and line-by-line rewrite before submission.