Shravan Vasishth is unimpressed by this evidence that was given to support the claim that being bilingual postpones symptoms of dementia:
My reaction: Seems like there could be some selection issues, no?
Shravan: Also, low sample size, and confirming what she already believes. I would be more impressed if she found evidence against the bilingual advantage.
Me: Hmmm, that last bit is tricky, as there’s also a motivation for people to find surprising, stunning results.
Shravan: Yes, but you will never find that this surprising, stunning result is something that goes against the author’s own previously published work. It always goes against someone *else*’s. I find this issue to be the most surprising and worrying of all, even more than p-hacking, that we only ever find evidence consistent with our beliefs and theories, never against.
Indeed, Shravan’s example confirms what I already thought about scientists.