Readers of Retraction Watch will be no strangers to the practice of issuing Expressions of Concern — editorial notices from journals that indicate a paper’s results may not be valid. While a good idea in theory — so readers can be aware of potential issues while an investigation is underway — in practice, it’s a somewhat flawed system. As we (and others before us) have shown, so-called EOCs can linger indefinitely, leaving researchers unsure how to interpret a flagged paper.
The Committee on Publication Ethics (COPE) agrees that the system has room for improvement. Although COPE has included advice on when to issue EOCs within its retraction guidelines, it has allotted time in the next COPE Forum (Feb 26) to discuss the topic. Some questions it’s considering:
As many of our readers will know, we’ve been having serious technical issues with the site. We’re cautiously optimistic that they’ve been solved, so although we’re still working on fixes, we’re going to try posting again. Thanks for your ongoing patience.
The authors of a highly cited 2016 research letter on a way to improve the efficiency of solar panels have retracted their work following “concerns about the reproducibility.”
A medical journal has
A glacier researcher has retracted a Nature paper after mistakenly underestimating glacial melt by as much as a factor of ten.
Authors of a 2018 paper have retracted it after discovering “the conclusions in the article cannot be relied upon.”


