Hmm? They find that one additional year of schooling increases IQ by 3.7 points. I'd say taking that figure with the difference in schools that blacks and white

Hmm? They find that one additional year of schooling increases IQ by 3.7 points. I'd say taking that figure with the difference in schools that blacks and whites in the US usually attend and you've got a plausible answer that the IQ gap is created through environmental differences.