/sci/ - Science & Math

(2012) Rushton concludes that there has been no narrowing in the mean Black-White IQ difference predicted by heritable g.

Rushton also invalidates research by Nisbett, Dickens, and Flynn that show black gains in IQ by evaluating their lack of data and use of specious arguments. He shows that the little data they had to prove these points obscured the topic by invoking alleged age and social class interactions and adoption studies of very young children. Their data was based on ideas, not observations. In his own words on the twin studies cited: "There is no evidence of any special cultural influence, such as extreme deprivation or being raised as a visible minority, that operates in one group and not in others."

He shows using a meta-analysis that there has been no reduction in the mean racial differences between Blacks and Whites and that all claims of, "systemic issues," are spurious and unsupported by factual evidence. The credence given to researchers saying that society is to blame for the failures of adopted Blacks comes from a cursory glance at a specious statement - they have no evidence.

http://www.sciencedirect.com/science/article/pii/S0160289605000917

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