Black/White IQ Gap: Three Cheers for Nurture

“The constancy of the black/white IQ gap is a myth. Blacks have gained 5 or 6 IQ points on whites over the last 30 years. Neither changes in the ancestry of those classified as black nor changes in those who identify as black can explain more than a small fraction of this gain. Therefore, environment has been responsible. The last two decades have seen both positive and negative developments: gains in occupational status and school funding have been accompanied by more black preschoolers in single-parent homes and lower income in those homes (Neal, in press). We believe that further black environmental progress would engender further black IQ gains.

Forthcoming: Psychological Science, October 2006

Black Americans Reduce the Racial IQ Gap: Evidence from Standardization Samples

William T. Dickens and James R. Flynn

It is often asserted that blacks have made no IQ gains on whites, despite relative environmental gains, and that this adds credibility to the case that the black/white IQ gap has genetic origins. Until recently, there have been no adequate data to measure black IQ trends. We analyze data from nine standardization samples for four major tests of cognitive ability. These suggest that blacks have gained 5 or 6 IQ points on non-Hispanic whites between 1972 and 2002. Gains have been fairly uniform across the entire range of black cognitive ability.

Link (pdf)“

originally published:

http://dienekes.blogspot.com/2006/08/white-black-iq-gap-has-shrunk-in.html