Implications of the Cattell-Horn-Carroll theory on ethnic differences in IQ

Psychological Reports
Oliver W Edwards, David P Fuller

Abstract

The Cattell-Horn-Carroll theory of intelligence and the Spearman-Jensen hypothesis were applied to help interpret mean IQ differences among ethnic groups. The Cattell-Horn-Carroll theory classifies cognitive abilities on three strata, which differ by magnitude of generality including specific, broad, and general abilities. The Spearman-Jensen hypothesis advances the belief that mean IQ differences between African Americans and Euro-Americans occur as a function of the test's g loadings. Although IQ differences between African Americans and Euro-Americans occur, the differences should be larger on tests with higher g loadings and smaller on tests with lower g loadings. The analysis described in this paper may serve as the catalyst to encourage all intelligence test publishers to supply test users with data regarding mean IQ differences among various ethnic groups.

References

Oct 1, 1966·Journal of Educational Psychology·J L Horn, R B Cattell
Nov 7, 1998·The American Psychologist·J A Naglieri
Aug 3, 2001·American Indian and Alaska Native Mental Health Research : the Journal of the National Center·G A Plank
Aug 9, 2003·Child: Care, Health and Development·J A DezoeteB Tuck
Oct 1, 1993·Multivariate Behavioral Research·J E Gustafsson, G Balke

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Citations

Dec 21, 2006·Journal of Intellectual & Developmental Disability·Oliver W Edwards

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