Abstract
Data from 15 tests of cognitive ability obtained from the Hawaii Family Study of Cognition were examined for relationships with 18 blood polymorphisms. The number of significant associations did not exceed the number expected by chance alone. Significant regression of pooled verbal and spatial test scores on a constructed zygosity index demonstrated that increasing homozygosity was associated with improved scores. The effect was consistent in both parents and offspring, probably in both sexes, and for subjects of both Japanese and European ancestry. However, these blood polymorphisms contributed very little to total variation in test scores.
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The results reported here are made possible by collaboration of a group of investigators (G. C. Ashton, R. C. Johnson, M. P. Mi, and M. N. Rashad at the University of Hawaii and J. C. DeFries, G. E. McClearn, S. G. Vandenberg, and J. R. Wilson at the University of Colorado) supported by NSF Grant GB 34720 and National Institute of Child Health and Human Development Grant HD 06669.
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Ashton, G.C. Blood polymorphisms and cognitive abilities. Behav Genet 16, 517–529 (1986). https://doi.org/10.1007/BF01066338
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DOI: https://doi.org/10.1007/BF01066338