Back in May I discussed a paper published in PNAS which, I claimed, was using scientific terminology in a sloppy way. The authors, Pearce et al., used the word “neuropeptides” to refer to six molecules, but three of them weren’t neuropeptides at all. The authors acknowledged this minor error and issued a correction.
Now, it emerges that there may be more serious problems with the PNAS paper. In a letter published last week, researchers Patrick Jern and colleagues say that the statistics u