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DNA markers associated with general and specific cognitive abilities

Petrill, Stephen A., Plomin, Robert, McClearn, Gerald E., Smith, Deborah L., Vignetti, Sylvia, Chorney, Michael J., Chorney, Karen, Thompson, Lee A., Detterman, Douglas K., Benbow, Camilla, Lubinski, David, Daniels, Joanna, Owen, Michael John and McGuffin, Peter 1996. DNA markers associated with general and specific cognitive abilities. Intelligence 23 (3) , p. 191. 10.1016/S0160-2896(96)90003-3

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Abstract

Multivariate quantitative genetic research suggests a hierarchical model of cognitive abilities where genetic effects are largely general, cutting across most cognitive abilities. Some genetic effects, however, are specific to certain cognitive abilities. These results lead to a hypothesis for molecular genetic research: Although most genes associated with one cognitive ability will be related to other cognitive abilities, some genes will be specific to a particular cognitive ability. The current research explored this hypothesis in an analysis of data on specific cognitive abilities from 86 children from 6 to 12 years of age from a larger allelic association study of general cognitive ability. Eight DNA markers were entered simultaneously in separate multiple regression analyses predicting each of four specific cognitive ability factors (Verbal, Spatial, Perceptual Speed, Memory), as well as WISC-R subtest scores. Four markers (CTGB33, EST00083, HLA, and SOD2) showed similar effects across the cognitive ability scales. suggesting that they are related to general cognitive ability (g). These associations became negligible when the effects of 'g' (WISC-R IQ) were removed. Three markers (ADH5, DM, and NGFB) continued to be significantly associated with specific cognitive ability scales after the effects of 'g' were removed. Although preliminary, these molecular genetic results support the hierarchical model predicted by quantitative genetic research.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > R Medicine (General)
Publisher: ABLEX PUBL CORP
ISSN: 01602896
Last Modified: 04 Jun 2017 08:41
URI: http://orca.cf.ac.uk/id/eprint/82721

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