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Original Articles

A neuropsychological study of personality: Trait openness in relation to intelligence, fluency, and executive functioning

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Pages 1068-1073 | Received 11 Apr 2009, Accepted 08 Feb 2010, Published online: 19 Apr 2010
 

Abstract

Openness is a personality trait that has been linked to intelligence and divergent thinking. CitationDeYoung, Peterson, and Higgins (2005) theorized that trait Openness depends on dopamine function, especially in the prefrontal cortex. We tested their theory in 335 healthy adults by hypothesizing that individual differences in Openness would correlate more strongly with performance on tests of executive function than on tests of intelligence and fluency. However, Openness correlated more strongly with verbal/crystallized intelligence (Gc; r = .44) than with executive functioning (r = .16) and fluency (r = .24). Further, the partial correlation between Openness and Gc increased from r = .26 among young adults to r = .53 among elderly adults. These findings suggest that Openness is more closely associated with the acquisition of broad verbal intellectual skills and knowledge than with executive abilities localized to a specific brain region or neurotransmitter system.

Acknowledgments

Financial support for this research was provided by NIH/NIMH (National Institutes of Health/National Institute of Mental Health) Grants MH60504, MH52886, MH43775, and MH068522, the Therapeutic Cognitive Neuroscience Fund, and the Benjamin & Adith Miller Family Endowment on Aging, Alzheimer's and Autism Research.

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