alt Hacker NewsIQ correlates most strongly with socioeconomic class, with members of the same ethnic group scoring higher over the decades as that ethnic group as a whole becomes wealthier.
IQ correlates most strongly with socioeconomic class, with members of the same ethnic group scoring higher over the decades as that ethnic group as a whole becomes wealthier.
Exactly the opposite is true. Adoption studies have been used to isolate the effect of SES itself, and the contribution of that factor is low: https://www.sciencedirect.com/science/article/abs/pii/S01602... (“Proportion of variance in IQ attributable to environmentally mediated effects of parental IQs was estimated at .01… Heritability was estimated to be 0.42.”).