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A pretty big racial cognitive gap remains after adjusting for income, at least in America. Poor whites do better on cognitive tests than wealthy African Americans: http://glpiggy.net/2013/03/19/a-sociologist-looks-at-race-di...

African Americans are closer to European IQ levels than Africans, probably for several environmental and genetic reasons (better nutrition and schooling, ~25% European ancestry, etc)

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That's true, that a gap remains when you adjust for a some obvious confounding factors, which makes it all the stranger that people are so determined to use the non-adjusted figure, it's as if the bigger number somehow resonates more with what they want to believe, than the more scientifically valid one. Maybe they're scared a that a smaller gap could be bridged by simply examining a few more variables.

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