Is copying my own published abstract plagiarism?

You do need to treat that paragraph the same way you would any other source, even if it’s your own work. In academic writing, re‑using text that has already appeared in a peer‑reviewed venue without a citation is considered self‑plagiarism, and most universities and journals have explicit policies against it. The safest route is to acknowledge the original conference paper with a proper reference and, if you’re quoting the exact wording, to put it in quotation marks or use a block quote according to your department’s style guide. That way the committee sees that you’re building on a previously vetted contribution rather than trying to pass the same words off as fresh material. A common misconception is that “I wrote it, so I can reuse it” automatically exempts you from citation. The issue isn’t ownership; it’s transparency. Your thesis is a new, comprehensive document that will be archived and read independently of the conference proceedings. If a reader can’t trace where a particular idea or phrasing first appeared, they might assume it’s original to the thesis, which can inflate your contribution and mislead evaluators. many institutions run plagiarism‑detection software that flags identical strings of text, even if they come from your own publications. Without a citation, the software will raise a red flag and you’ll have to spend valuable time explaining that it’s your own work, which could look suspicious given the tight timeline before your committee meeting. There are trade‑offs to consider. If the abstract’s wording is essential because it captures a concise definition or a specific technical term you coined, quoting it verbatim with a citation preserves the precision you need. On the other hand, if the idea can be expressed in a fresh way, paraphrasing and citing the original source can demonstrate that you’ve reflected on the material and integrated it into the broader narrative of your thesis. Some fields are more tolerant of verbatim reuse of methods sections or standard definitions, but even there a citation is usually required. Edge cases arise when the original work is unpublished, such as a pre‑print or an internal report; in those situations you still cite, but you might need to clarify the status of the source. Imagine you’re writing the introduction for a thesis on “adaptive control in renewable energy systems,” and you want to include the sentence, “Adaptive control strategies can significantly improve the efficiency of variable‑speed wind turbines under fluctuating wind conditions,” which you originally phrased in a conference abstract five years ago. The cleanest approach is to write the sentence as you would now, perhaps tweaking it slightly, and then add a citation like (YourName, 2018). If you feel the original wording is the most precise, you could quote it directly and still cite the conference paper. Either way, the committee will see that you’re being transparent about the provenance of the text, and you’ll avoid any accusation of self‑plagiarism. So, cite yourself and, if you reuse the exact wording, mark it as a quotation to stay on the safe side.