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Genetic Model Fitting in IQ, Assortative Mating & Components of IQ variance
Christiane Capron, Adrian R. Vetta and Atam Vetta
Race, Gender & Class
Vol. 5, No. 3, A Race, Gender & Class Critique of Genetic Determinism (1998), pp. 51-60
Published by: Jean Ait Belkhir, Race, Gender & Class Journal
Stable URL: http://www.jstor.org/stable/41674873
Page Count: 10
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The biometrical school of IQists who fit models to IQ data trace their intellectual ancestry to Fisher (1918) through Mather & Jinks. There is, however no evidence that they understand Fisher or, indeed, have read it. Their genetic models have no predictive value and are, therefore, worthless. Fisher was critical of the concept of heritability, yet all their efforts are dedicated to finding an estimate of this worthless parameter. There is an assortative mating for IQ and Fisher showed that assortative mating introduces complexities in the study of a genetic trait. Assortative mating destroys independent segregation of genes, therefore, the concept of heritability which assumes independent segregation of genes, is not useful in presence of assortative mating.
Race, Gender & Class © 1998 Jean Ait Belkhir, Race, Gender & Class Journal