Individual Differences in Delay Discounting
- 1 September 2008
- journal article
- Published by SAGE Publications in Psychological Science
- Vol. 19 (9), 904-911
- https://doi.org/10.1111/j.1467-9280.2008.02175.x
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.Keywords
This publication has 35 references indexed in Scilit:
- Functional Specializations in Lateral Prefrontal Cortex Associated with the Integration and Segregation of Information in Working MemoryCerebral Cortex, 2006
- Cognitive Reflection and Decision MakingJournal of Economic Perspectives, 2005
- Working Memory and Intelligence: The Same or Different Constructs?Psychological Bulletin, 2005
- Working memory capacity and its relation to general intelligenceTrends in Cognitive Sciences, 2003
- Working Memory Capacity as Executive AttentionCurrent Directions in Psychological Science, 2002
- Rostrolateral Prefrontal Cortex Involvement in Relational Integration during ReasoningNeuroImage, 2001
- The Hyperbolic Consumption Model: Calibration, Simulation, and Empirical EvaluationJournal of Economic Perspectives, 2001
- TEMPORAL DISCOUNTING: BASIC RESEARCH AND THE ANALYSIS OF SOCIALLY IMPORTANT BEHAVIORJournal of Applied Behavior Analysis, 2001
- Toward a behavioral economic understanding of drug dependence: delay discounting processesAddiction, 2001
- Predicting premorbid IQ: A revision of the national adult reading testThe Clinical Neuropsychologist, 1989