That pic is a lie - men have both a wider distribution *and* a higher mean (by about 4 points)
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Studies cherry-picked IQ to favor girls (i,e,) tested boys and girls when the girls had already been through puberty; boys had not. Buy the time boys reached age 21 they had caught up and surpassed the girls by 5 IQ points. The crudely drawn bell curve above has been manipulated
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It goes along with every observation we have as well - men have larger brains and larger brains per body weight https://www.sciencedirect.com/science/article/pii/S0160289604000492?via%3Dihub …pic.twitter.com/dcFdltNkln
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