Individual differences in impulsive and risky choice: effects of environmental rearing conditions

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dc.contributor.author Kirkpatrick, Kimberly
dc.contributor.author Marshall, Andrew T.
dc.contributor.author Smith, Aaron P.
dc.contributor.author Koci, Juraj
dc.contributor.author Park, Yoonseong
dc.date.accessioned 2014-07-22T13:44:25Z
dc.date.available 2014-07-22T13:44:25Z
dc.date.issued 2014-07-22
dc.identifier.uri http://hdl.handle.net/2097/18120
dc.description.abstract The present experiment investigated early-rearing environment modulation of individual differences in impulsive and risky choice. Rats were reared in an isolated condition (IC; n = 12), in which they lived alone without novel stimuli, or an enriched condition (EC; n = 12), in which they lived among conspecifics with novel stimuli. The impulsive choice task involved choices between smaller-sooner (SS) versus larger-later (LL) rewards. The risky choice task involved choices between certain-smaller (C-S) versus uncertain-larger (U-L) rewards. Following choice testing, incentive motivation to work for food was measured using a progressive ratio task and correlated with choice behavior. HPLC analyses were conducted to determine how monoamine concentrations within the prefrontal cortex (PFC) and nucleus accumbens (NAC) related to behavior in different tasks. IC rats were more impulsive than EC rats, but they did not differ in risky choice behavior. However, choice behavior across tasks was significantly correlated (i.e., the more impulsive rats were also riskier). There were no group differences in monoamine levels, but noradrenergic and serotonergic concentrations were significantly correlated with impulsive and risky choice. Furthermore, serotonin and norepinephrine concentrations in the NAC significantly correlated with incentive motivation and the timing of the reward delays within the choice tasks. These results suggest a role for domain general processes in impulsive and risky choice and indicate the importance of the NAC and/or PFC in timing, reward processing, and choice behavior. en_US
dc.language.iso en_US en_US
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S0166432814002423 en_US
dc.subject Impulsive choice en_US
dc.subject Risky choice en_US
dc.subject Differential rearing en_US
dc.subject Individual difference en_US
dc.subject Monoamine concentration en_US
dc.subject Rat en_US
dc.title Individual differences in impulsive and risky choice: effects of environmental rearing conditions en_US
dc.type Article (author version) en_US
dc.date.published 2014 en_US
dc.citation.doi doi:10.1016/j.bbr.2014.04.024 en_US
dc.citation.epage 127 en_US
dc.citation.jtitle Behavioural Brain Research en_US
dc.citation.spage 115 en_US
dc.citation.volume 269 en_US
dc.contributor.authoreid kirkpatr en_US
dc.contributor.authoreid koci en_US
dc.contributor.authoreid ypark en_US


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