Sorry, my advice is, Google for the whole replication crisis thing. I think I read something about this specific set of studies on slate star codex, so that's a good place to look.
Please pardon that I don't have enough time to look for the sources myself.
No, he's right. I wouldn't have even mentioned Social sciences. Medical studies are just as terrible. We need to question every study. Repeat said studies. Make sure the repeat studies were done right. Then study it again by outsiders.