"The main influence on IQ variation was genetic." How do genes cause/influence psychological traits? What's your response to the fact that thinking (the main aspect of test-taking) is irreducible to brain states/structure (and also genes/DNA)?
TrannyPornO found another extended twin study, this one also for IQ. Had the same finding as the 6 other studies I reviewed. Vertical cultural transfer is mostly not real. https://www.sciencedirect.com/science/article/pii/S1041608007000982?via%3Dihub … review: http://emilkirkegaard.dk/en/?p=7370 pic.twitter.com/ggubdjPQhp
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very interesting
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