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THIRTY YEARS OF RESEARCH ON RACE DIFFERENCES IN …

THIRTY YEARS OF RESEARCH ON RACEDIFFERENCES IN COGNITIVE ABILITYJ. Philippe RushtonThe University of Western OntarioArthur R. JensenUniversity of California, BerkeleyTheculture-only(0% genetic 100% environmental) and thehereditarian(50%genetic 50% environmental) models of the causes of mean Black White differencesin cognitive ability are compared and contrasted across 10 categories of evidence:the worldwide distribution of test scores,gfactor of mental ability, heritability, brainsize and cognitive ability, transracial adoption, racial admixture, regression, relatedlife-history traits, human origins RESEARCH , and hypothesized environmental vari-ables.

1996) to evaluate the book s conclusions. Based on their review of twin and other kinship studies, the Task Force for the most part agreed with Jensen s (1969) Harvard Educational Review article and The Bell Curve, that within the White population the heritability of IQ is around .75 (p. 85). As to the cause of the

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