The study specifically controlled to find causationhttps://twitter.com/brobrahbrehbro/status/1142592617391120384 …
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IQ is remarkably stable throughout your life, even from childhood – please try and get up to speed before muddying the waters any further
IQ is quite stable, but heritability increases until early 20s, and developmental behavior genetics shows new genetic influences affect IQ in adolescence & young adulthood.
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When people say heritability increases, it confuses me. Does that mean the expression of IQ changes and trends towards the heritable mean of the parents, despite being higher or lower earlier? It sounds like you get new genetic material or new genes come online, otherwise.
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I think it's because genes come online, and people have more control over their environment as they get older so the environment you were born into has less impact and the environment your genes "want" has more.
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This isn't Arby's?
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