Originally posted by deliveryman
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The more controversial view that a significant portion of the racial IQ gap is ultimately of genetic origin has been advanced by academics such as Arthur Jensen, J. Philippe Rushton and Richard Lynn, which according to the American Psychological Association has even less empirical support. The claim that the IQ gap has a genetic component met with widespread criticism in the popular media, particularly after the publication of "The Bell Curve", and has not to date gained acceptance by the wider academic community.
The theory that genetic differences contribute to the difference in average IQ between races has been criticized for this lack of direct evidence, and the fact that it must therefore rely on indirect evidence instead.[78] Supporters of a partially genetic basis for the IQ gap have asserted that despite this, such a model is able to provide a more parsimonious explanation for the IQ gap than one which does not involve genetic factors, because it does not rely on the existence of undiscovered environmental X-factors that affect IQ variance between races but not within them. In The g Factor, Arthur Jensen also asserts that this theory is able to make specific predictions about future results, while explanations for the IQ gap that rely on unknown environmental factors are not empirically testable or falsifiable
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