Standard deviation of total SAT scores: not simply the sum of the standard deviations of subtests

Someone on Reddit for SlateStarCodex: AFAIK, SATs are normed to mean of 500 per section and standard deviation of 100. Assuming that math and verbal are highly correlated, that approximates…

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Twin control studies really are evidence of causation: reply to JayMan

I found some genetically informative studies on the benefits of marriage: Does marriage inhibit antisocial behavior?: An examination of selection vs causation via a longitudinal twin design. Accounting for the…

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About that blog: Italian IQs, Lynn IQs, brain size and doctors

https://notpoliticallycorrect.me/ Twitter: RaceRealist88 Since I am repeatedly asked by a bunch of differently looking people to comment on that particular blog. I don't know the guy, but he's been quite…

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No special sex-linked inheritance of cognitive ability/intelligence (except for a few rare disorders)

Some guy on SSC: I remember hearing somewhere that the IQ of the mother is what determines the IQ of the children. Is this accurate? To what extent does the…

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