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The Replication Crisis of Candidate Gene Research
In the early 2000s, before we started even talking about the replication crisis in psychology, this was sort of happening. Instead of looking at like one genetic variant, you look at literally hundreds of thousands of genetic variants. It turns out that for things that are complicated, even something like height, but also things like educational attainment and so on, it's not that there's one gene that like has a big effect.