TY - JOUR
T1 - Individual differences in delay discounting
T2 - Relation to intelligence, working memory, and anterior prefrontal cortex
AU - Shamosh, Noah A.
AU - DeYoung, Colin G.
AU - Green, Adam E.
AU - Reis, Deidre L.
AU - Johnson, Matthew R.
AU - Conway, Andrew R.A.
AU - Engle, Randall W.
AU - Braver, Todd S.
AU - Gray, Jeremy R.
PY - 2008/9
Y1 - 2008/9
N2 - 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. ©
AB - 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. ©
UR - http://www.scopus.com/inward/record.url?scp=54049092894&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=54049092894&partnerID=8YFLogxK
U2 - 10.1111/j.1467-9280.2008.02175.x
DO - 10.1111/j.1467-9280.2008.02175.x
M3 - Article
C2 - 18947356
AN - SCOPUS:54049092894
SN - 0956-7976
VL - 19
SP - 904
EP - 911
JO - Psychological Science
JF - Psychological Science
IS - 9
ER -