Race Differences in Cognitive Ability

THIRTY YEARS OF RESEARCH ON RACE DIFFERENCES IN cognitive ABILITY J. Philippe Rushton The University of Western Ontario Arthur R. Jensen University of California, Berkeley The culture-only (0% genetic100% environmental) and the hereditarian (50% genetic50% environmental) models of the causes of look upon inexorable gabardine differences in cognitive ability be compared and contrasted across 10 categories of evidence: the worldwide distribution of quiz scores, g factor of mental ability, heritability, brain size and cognitive ability, transracial adoption, racial admixture, regression, related life-history traits, human origins research, and hypothesized environmental variables. The new evidence reviewed here points to approximately genetic component in BlackWhite differences in suppose IQ. The implication for public policy is that the discrimination model (i.e., BlackWhite differences in socially valued outcomes will be equal barring discrimination) must be tempered by a distributional model (i.e., BlackWhite outcomes reflect cardinal group characteristics).

Section 1: Background Throughout the history of psychology, no question has been so persistent or so resistant to firmness as that of the relative roles of nature and nurture in causing person and group differences in cognitive ability (Degler, 1991; Loehlin, Lindzey, & Spuhler, 1975). The scientific fight goes back to the mid-19th century (e.g., Galton, 1869; Nott & Glidden, 1854). Starting with the widespread use of regularize mental tests in World War I, average ethnic and racial group differences were found. Especially vexing has been the cause(s) of the 15-point BlackWhite IQ difference in the United States. In 1969, the Harvard educational Review published Arthur Jensens lengthy article, How Much Can We elevate IQ and School Achievement? Jensen concluded that (a) IQ tests measure socially relevant general ability; (b) individual differences in IQ wee a high heritability, at least... If you want to get a full essay, order it on our website: Orderessay

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