Work

Subcortical intelligence: Caudate volume predicts IQ in healthy adults

Year: 2014

Type: article

Abstract: This study examined the association between size of the caudate nuclei and intelligence. Based on the central role of the caudate in learning, as well as neuroimaging studies linking greater caudate volume to better attentional function, verbal ability, and dopamine receptor availability, we hypothesized the existence of a positive association between intelligence and caudate volume in three large independent samples of healthy adults (total N = 517). Regression of IQ onto bilateral caudate volume controlling for age, sex, and total brain volume indicated a significant positive correlation between caudate volume and intelligence, with a comparable magnitude of effect across each of the three samples. No other subcortical structures were independently associated with IQ, suggesting a specific biological link between caudate morphology and intelligence.

Source: Human Brain Mapping

DOI: 10.1002/hbm.22710

Authors: Rachael G. Grazioplene, Sephira G. Ryman, Jeremy R. Gray, Aldo Rustichini, Rex E. Jung, Colin G. DeYoung

Institutions: University of Minnesota, Mind Research Network, Michigan State University, University of New Mexico

Language: English

Topic: Cognitive Abilities and Testing

Subfield: Experimental and Cognitive Psychology

Field: Psychology

Domain: Social Sciences

SDG: Good health and well-being

Open Access status: green