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Cognitive ability, self-assessed intelligence and personality: Common genetic but independent environmental aetiologies

Bratko, Denis; Butkovic, Ana; Vukasovic, Tena; Chamorro-Premuzic, Tomas and Von Stumm, Sophie. 2012. Cognitive ability, self-assessed intelligence and personality: Common genetic but independent environmental aetiologies. Intelligence, 40(2), pp. 91-99. ISSN 0160-2896 [Article]

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Abstract or Description

Self-perceived abilities (SPA), which play an important role in academic achievement, have been recently reported to be fully attributable to genetic and non-shared environmental influences. To replicate and extend this finding, 732 Croatian twins (15–22 years old) were assessed on cognitive ability, self-assessed intelligence (SAI), and Five Factor Model personality traits. In addition to attempting to replicate the finding that SAI is due to genetic and non-shared environmental influences, we used bivariate and multivariate genetic analyses to investigate genetic and environmental influences on the phenotypic association of IQ, SAI, and personality traits. The results replicated the finding that individual differences in SAI can be attributed to genetic and non-shared environmental influences. Bivariate and multivariate genetic analyses showed intelligence, SAI measures, and personality traits are inter-correlated not only at the phenotypic but also at the genotypic level. Multivariate analyses indicate that around 20% of IQ variance could be explained by SAI and personality traits (Neuroticism, Extraversion, Openness). In combination with other recent findings from behavior genetics, this result supports the idea of pleiotropy and generalist genes.

Item Type:

Article

Identification Number (DOI):

https://doi.org/10.1016/j.intell.2012.02.001

Keywords:

Self-assessed intelligence; Cognitive ability; Personality; Five Factor Model; Genetics; Twin study

Departments, Centres and Research Units:

Psychology

Dates:

DateEvent
March 2012Published

Item ID:

11227

Date Deposited:

28 Jan 2015 10:36

Last Modified:

04 Jul 2017 13:56

Peer Reviewed:

Yes, this version has been peer-reviewed.

URI:

http://research.gold.ac.uk/id/eprint/11227

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