Direct comparison
Plagiarism vs. Self-Plagiarism: Key Differences
Plagiarism takes another's work; self-plagiarism reuses your own. Only plagiarism meets the federal 42 CFR Part 93 research-misconduct definition.
Side-by-side comparison
| Dimension | Plagiarism | Self-Plagiarism |
|---|---|---|
| Whose work is reused | Another person's ideas, results, or words | The author's own previously published material |
| Federal research-misconduct status (42 CFR Part 93) | Meets the federal definition (93.103) when it involves PHS-funded research | Does not meet the federal definition — ORI's own guidance confirms it is excluded because the regulation is scoped to 'another person's' work |
| Can trigger an ORI misconduct inquiry | Yes, for PHS-funded research | No — handled as a publication-ethics matter, not an ORI misconduct case |
| Typical governing guidance | 42 CFR Part 93; COPE flowcharts; journal ethics policy | COPE Discussion Document: Text Recycling (2020); journal and institutional policy |
| Copyright exposure | Possible, if the copied passage is itself under someone else's copyright | Possible, if the reused text is from a paper whose copyright was transferred to a publisher |
| Core concern | Misattribution of authorship / credit theft | Misrepresenting a work's novelty; inflating apparent output |
| Typical detection method | Text-similarity software (Turnitin, Crossref Similarity Check) flagging overlap with others' published text | Same software, flagging overlap with the author's own prior publications |
| Typical editorial response | Correction, retraction, or referral to the author's institution/ORI depending on severity | Editor's note, required citation/disclosure, or expression of concern; retraction only in more severe or repeated cases |
| Closely related concepts | Mosaic/patchwork plagiarism, idea plagiarism | Salami slicing, duplicate publication |
Common questions
FAQ
Is self-plagiarism actually illegal?+
Generally no — reusing your own words is not copyright infringement or theft in the way plagiarism of someone else's work can be, unless you previously transferred copyright in that earlier text to a publisher. In that case, reusing substantial verbatim passages without permission can be a copyright issue even though you wrote the original text yourself.
Can self-plagiarism still get a paper retracted?+
Yes, in more serious cases — particularly where the recycled material makes up a large share of the paper's claimed contribution, or where it overlaps with salami slicing or duplicate publication. Most cases are resolved with a correction, added citation, or editor's note rather than retraction, but journals vary and COPE's guidance leaves the severity judgment to the editor.
Does reusing my own methods section count as self-plagiarism?+
It can, if it's substantial and undisclosed. In practice, many journals and editors treat brief, standardized methods language (e.g., a lab's established protocol description) more leniently than reused results or discussion text, especially when it cites back to the original protocol publication — but the safest practice is always to disclose reuse and cite the earlier paper.
Why does the distinction between plagiarism and self-plagiarism matter for research administrators?+
Because it determines the correct process. An allegation of plagiarism of another author's work for PHS-funded research may require notifying the institution's Research Integrity Officer and following 42 CFR Part 93 procedures. A self-plagiarism concern is a publication-ethics matter for the journal and, at most, an internal institutional policy question — it does not follow the federal misconduct inquiry/investigation pathway.
