Mechanisms of impulsive choice: I. Individual differences in interval timing and reward processing

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dc.contributor.author Marshall, Andrew T.
dc.contributor.author Smith, Aaron P.
dc.contributor.author Kirkpatrick, Kimberly
dc.date.accessioned 2015-05-18T12:17:42Z
dc.date.available 2015-05-18T12:17:42Z
dc.date.issued 2015-05-18
dc.identifier.uri http://hdl.handle.net/2097/19252
dc.description.abstract Impulsive choice behavior incorporates the psychological mechanisms involved in the processing of the anticipated magnitude and delay until reward. The goal of the present experiment was to determine whether individual differences in such processes related to individual differences in impulsive choice behavior. Two groups of rats (Delay Group and Magnitude Group) were initially exposed to an impulsive choice task with choices between smaller-sooner (SS) and larger-later (LL) rewards. The Delay Group was subsequently exposed to a temporal discrimination task followed by a progressive interval task, whereas the Magnitude Group was exposed to a reward magnitude sensitivity task followed by a progressive ratio task. Inter-task correlations revealed that the rats in the Delay Group that made more self-controlled (LL) choices also displayed lower standard deviations in the temporal bisection task and greater delay tolerance in the progressive interval task. Impulsive choice behavior in the Magnitude Group did not display any substantial correlations with the reward magnitude sensitivity and progressive ratio tasks. The results indicate the importance of core timing processes in impulsive choice behavior, and encourage further research examining the effects of changes in core timing processes on impulsive choice. en_US
dc.language.iso en_US en_US
dc.relation.uri http://onlinelibrary.wiley.com/doi/10.1002/jeab.88/abstract en_US
dc.rights This is the peer reviewed version of the following article: Marshall, A. T., Smith, A. P., & Kirkpatrick, K. (2014). Mechanisms of impulsive choice: I. Individual differences in interval timing and reward processing. Journal of the Experimental Analysis of Behavior, 102(1), 86-101, which has been published in final form at [http://onlinelibrary.wiley.com/doi/10.1002/jeab.88/abstract]. en_US
dc.subject Impulsive behavior en_US
dc.subject Discounting en_US
dc.subject Timing en_US
dc.subject Reinforcer magnitude en_US
dc.subject Rats en_US
dc.title Mechanisms of impulsive choice: I. Individual differences in interval timing and reward processing en_US
dc.type Article (author version) en_US
dc.date.published 2014 en_US
dc.citation.doi 10.1002/jeab.88 en_US
dc.citation.epage 101 en_US
dc.citation.issue 1 en_US
dc.citation.jtitle Journal of the Experimental Analysis of Behavior en_US
dc.citation.spage 86 en_US
dc.citation.volume 102 en_US
dc.contributor.authoreid kirkpatr en_US


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