The Flynn Effect has reversed in several countries, but the cause of the resulting IQ decline is still a mystery. http://www.sciencedirect.com/science/article/pii/S0160289616300198 …pic.twitter.com/xS5ReT4eXM
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looks likely it kicked in before welfare state in France, USA, UK at least. Probably most of W Europe https://www.google.co.uk/url?sa=t&source=web&rct=j&url=https://www.jstor.org/stable/1972729&ved=0ahUKEwjm9Nj_g_LPAhWCHsAKHZFsDgIQFggeMAA&usg=AFQjCNEhsqaL65ZuHGYURoUG7pUkyWccww&sig2=b5O_4A9XkBXMnQ3-sC5e_w …
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