In press at Psychological Science PLEASE DO NOT CITE OR DISTRIBUTE WITHOUT PERMISSION Individual differences in delay discounting: Relation to intelligence, working memory, and anterior prefrontal cortex
نویسندگان
چکیده
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 processes (WM), we assessed delay discounting, intelligence (g), WM (span tasks, 3-back task), and WM-related neural activity (using fMRI) in 103 healthy adults. Delay discounting was negatively correlated with g and WM. Of note, WM explained no variance in delay discounting beyond that explained by g, suggesting that processes through which WM relates to delay discounting are shared by g. WM-related neural activity in left anterior prefrontal cortex (aPFC, BA 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 due to processes instantiated in aPFC, a region known to support the integration of diverse information.
منابع مشابه
Individual differences in delay discounting: relation to intelligence, working memory, and anterior prefrontal cortex.
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 neg...
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