Have you ever seen a picture of the "hierarchy of evidence"? For some reason, it puts meta-analyses on top. But meta-analyses are often worse than the best studies included in them. They also tend to produce exaggerated results compared to preregistered replications:

Here's that pyramid in case you haven't seen it. To learn more, go see: cremieux.xyz/p/beware-the-m

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I write about genetics, 'metrics, and demographics. Read my long-form writing at https://t.co/8hgA4nNS2A.