Discussions of race and intelligence as well as claims of genetic differences in intelligence along racial lines have appeared in both popular science and academic research since the inception of iq testing in the early 20th century modern scholarship regards race as a social construct and intelligence has no agreed upon definition the validity of iq tests as a metric for general . Yes there are differences in measured iq between various races but what if anything do these differences mean one cannot accurately and meaningfully compare scores of people with . The intellectual differences between races are mainly caused by genetic differences in particular differences in the frequency of alleles linked to high and low intelligence involved in brain size nerve conduction or in different neurophysiological processes. Basic concepts this research is grounded in several controversial assumptions the social categories of race and ethnicity are concordant with genetic categories such as biogeographic ancestry intelligence is measurable see psychometrics and is dominated by a unitary general cognitive ability
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