Fair enough, but the content of the abstract itself already had content that was new to me. Actually, the abstract alone was useful for me, as it hadn't occurred to me that feedback might actually be harmful in such an environment. In retrospect it's obvious, but I hadn't happened to think about it.
I often scan through abstracts of scientific articles, only absorbing the information contained in them. Yes it would be better to read the whole articles, but there are too many interesting articles to read them all, and if I ever actually need to check up on the details, I can return to the article in question.
Didn't have the time to read the article itself, but based on the abstract, this certainly sounds relevant for LW:
Hat tip to the BPS Resarch Digest.
ETA: Some other relevant studies from the same site, don't remember which ones have been covered here already:
Threat of terrorism boosts people's self-esteem
The "too much choice" problem isn't as straightforward as you'd think
Forget everything you thought you knew about Phineas Gage, Kitty Genovese, Little Albert, and other classic psychological tales