Duplication is a frequent reason for the retractions we cover. Such duplication retractions are so common that we don’t get to most of them. While many have argued that duplication pollutes the literature, and can bias meta-analyses when the same study ends up being counted more than once, others say the need to come up with new ways to say the same thing is a waste of time. (That doesn’t explain why some scientists don’t just put their old words in quotes and cite them, but we digress.)
Appropriately, the Committee on Publication Ethics is taking up the issue at their regular forum tomorrow, using new guidelines produced by BioMedCentral as a starting point. Here’s an excerpt: Continue reading How much self-plagiarism, aka duplication, is too much?