The contribution of environmental factors to racial gaps in intelligence scores is indicated by

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All of the evidence mentioned supports the idea that environmental factors play a significant role in racial gaps in intelligence scores. The fact that individual differences within a race are much greater than differences between races suggests that genetic factors cannot account for the gaps. The evidence that White and Black infants score equally well on certain measures of infant intelligence suggests that initial differences in intelligence are not present at birth. Finally, the fact that Asian students outperform North American students on math achievement and aptitude tests suggests that cultural and environmental factors (such as education and parenting practices) play a significant role in intelligence scores.

The Contribution of Environmental Factors to Racial Gaps in Intelligence