Individual Differences in Delay Discounting
Adult
Intelligence Tests
Male
Brain Mapping
Motivation
Adolescent
Culture
Intelligence
Individuality
Prefrontal Cortex
Magnetic Resonance Imaging
Young Adult
03 medical and health sciences
Imaging, Three-Dimensional
Memory, Short-Term
0302 clinical medicine
Adaptation, Psychological
Image Processing, Computer-Assisted
Humans
Female
Dominance, Cerebral
Internal-External Control
DOI:
10.1111/j.1467-9280.2008.02175.x
Publication Date:
2008-10-10T14:55:22Z
AUTHORS (9)
ABSTRACT
Lower delay discounting (better self-control) is linked to higher intelligence, but the basis of this relation is uncertain. To investigate the potential role of working memory (WM) processes, we assessed delay discounting, intelligence ( g), WM (span tasks, 3-back task), and WM-related neural activity (using functional magnetic resonance imaging) in 103 healthy adults. Delay discounting was negatively correlated with g and WM. WM explained no variance in delay discounting beyond that explained by g, which suggests that processes through which WM relates to delay discounting are shared by g. WM-related neural activity in left anterior prefrontal cortex (Brodmann's area 10) covaried with g, r = .26, and delay discounting, r = -.40, and partially mediated the relation between g and delay discounting. Overall, the results suggest that delay discounting is associated with intelligence in part because of processes instantiated in anterior prefrontal cortex, a region known to support the integration of diverse information.
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CITATIONS (318)
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