What's the min N you'd need to crack the genetics of intelligence with a GWAS? 1M, 10M? I wish a country would turn this into a manhattan project and get it over with.
It seems like the big lift would be getting 1M ppl to sit for a properly administered IQ test. Educational attainmemt interests me not at all.
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The hits for educational attainment are almost all IQ (https://en.wikipedia.org/wiki/Genetic_correlation …). It's true that as a phenotype it's a poor proxy for IQ itself. And yet there's a LOT to discover using it. Also, SAT scores correlate 0.8 with IQ so you could also get self-reported data for that
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