Genetic covariation among facets of openness to experience and general cognitive ability

Wainwright, Mark A., Wright, Margaret J., Luciano, Michelle, Geffen, Gina M. and Martin, Nicholas G. (2008) Genetic covariation among facets of openness to experience and general cognitive ability. Twin Research and Human Genetics, 11 3: 275-286. doi:10.1375/twin.11.3.275

Author Wainwright, Mark A.
Wright, Margaret J.
Luciano, Michelle
Geffen, Gina M.
Martin, Nicholas G.
Title Genetic covariation among facets of openness to experience and general cognitive ability
Journal name Twin Research and Human Genetics   Check publisher's open access policy
ISSN 1832-4274
Publication date 2008-06-01
Year available 2008
Sub-type Article (original research)
DOI 10.1375/twin.11.3.275
Open Access Status Not Open Access
Volume 11
Issue 3
Start page 275
End page 286
Total pages 12
Editor K. M. Kirk
Nicholas G. Martin
Place of publication Bowen Hills, QLD, Australia
Publisher Australian Academic Press
Language eng
Subject C1
920410 Mental Health
170101 Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)
Abstract Genetic and environmental sources of covariation among cognitive measures of verbal IQ, performance IQ (PIQ), academic achievement, 2-choice reaction time (CRT), inspection time (IT) and the 6 Openness facets of the NEO Personality Inventory-Revised (NEO PI-R) were examined. The number of twin and twin–sibling pairs ranged from 432 (182 MZ, 350 DZ/sibling) to 1023 (273 MZ, 750 DZ/sibling) for cognitive measures, and between 432 (90 MZ, 342 DZ/sibling) — 437 (91 MZ, 346 DZ/sibling) for Openness facets. Structural equation modeling best supported a model with a 3-factor additive genetic structure. A genetic general factor subsumed the 5 cognitive measures and 5 of the 6 Openness facets (Actions did not load significantly). A second additive genetic factor incorporated the 6 Openness facets, and a third additive genetic factor incorporated the 5 cognitive measures. Specific additive and dominance genetic effects were also evident, as were shared common and shared unique environmental influences, and specific unique environmental effects. The Openness facets of Ideas and Values evidenced the strongest phenotypic correlations with cognitive indices, particularly verbal measures. The genetic correlations among Openness facets and cognitive measures ranged from −.06 to .79. Results were interpreted as suggesting that Openness is related to general cognitive ability (g) through a genetic mechanism and that gengenders a minor but discernable disposition towards Openness for the majority of facets.
Keyword Genetics & Heredity
Obstetrics & Gynecology
Genetics & Heredity
Obstetrics & Gynecology
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
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School of Medicine Publications
School of Psychology Publications
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Created: Wed, 15 Apr 2009, 01:53:38 EST by Mrs Jennifer English on behalf of School of Psychology