Race gaps in brain size in the very young -- figures here given the basic pattern but there's a lot more evidence. http://emilkirkegaard.dk/en/?p=7121 pic.twitter.com/Ea0R037Bri
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Fair points. Given known processes of CNS maturation extend to at least age 25, while relatively unbiased samples become quite difficult to obtain beyond roughly age 16-18, it is at least conceivable. Timing of male late growth spurts does come awfully close to that limit.
It does indeed. With regards to item gerrymandering, see this study which showed that it was possible under constraints of some test properties (using NHST). http://www.sciencedirect.com/science/article/pii/S0160289616300423 …
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Ah yes, for crystallized intelligence tests especially, it seems almost impossible by definition to avoid the ability to create systematic bias in one direction or another. Calibrating such a test for sex equality would be trivial.
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There is a way. You choose the items after what predicts multiple, and relevant outcomes as well as shows lack of DIF. So, start by making e.g. 250 items, then choose 50 best.
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Yes, exactly.
End of conversation
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