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"Currently, the existence of the 15-to-18 point difference (1.1 standard deviations) between Blacks and Whites in the U.S. is not in itself a matter of empirical dispute." "Further, the Black-White IQ difference shows up before 3 years of age on most standardized test batteries, even after matching on maternal education and other variables. Therefore it is not due to poor education since this has not yet begun to exert an effect. (The East Asian IQ advantage appears by five years of age.)" "Basic genetic theory predicts that the IQ of offspring will regress towards the mean IQ of the population group from which the parents come. This has been amply documented for a number of physical traits in humans and in other species." "Regression to the mean is seen, typically, when individuals with high IQ scores mate. Their children tend to show lower scores than their parents. The converse happens for low IQ parents; they have children with somewhat higher IQs. This is because the parents pass on some, but not all, of their exceptional genes to their offspring. It is analogous to rolling a pair of dice and having them come up two 6’s or two 1’s. The odds are that on the next roll, you will get some value that is not quite as high (or as low)." "Genetic theory predicts the precise magnitude of the regression effect. Culture-only theory makes no systematic or quantitative predictions. Black children with parents of IQ 115 regress to the Black IQ average of 85, while White children with parents of IQ 115 regress to the White IQ average of 100. Regression to a lower average IQ helps to explain the fact that Black children born to high IQ, wealthy, Black parents have test scores 2 to 4 points lower than do White children born to low IQ, poor White parents." http://www-users.york.ac.uk/~mb55/talks/regmean.htm Quote:
http://www.amazon.com/IQ-Wealth-Nati.../dp/027597510X Quote:
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Last edited by wehrmacht; 04-22-2011 at 11:52 PM..
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