Nisbett (2009) claims that brain size is not causal for cognitive ability and cites a sibling study. Hmm! Let's check it out. N=36 pairs.pic.twitter.com/HUbwxPVMgj
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Could not find either primary source for these claims. Ancient old conference presentation and military publication.
.@KirkegaardEmil Surprising that height & weight same among black and white women, and bust size larger for white. Probably different now.
It's military data. There is selection and it's non-random. I wouldn't make much of it. Could not find sample sizes either.
Male data may be more random, representative if it's from time of the draft, but U.S. never drafted women, so you're right.
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