Effects of fictive reward on rat's choice behavior

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Choices of humans and non-human primates are influenced by both actually experienced and fictive outcomes. To test whether this is also the case in rodents, we examined rat's choice behavior in a binary choice task in which variable magnitudes of actual and fictive rewards were delivered. We found that the animal's choice was significantly influenced by the magnitudes of both actual and fictive rewards in the previous trial. A model-based analysis revealed, however, that the effect of fictive reward was more transient and influenced mostly the choice in the next trial, whereas the effect of actual reward was more sustained, consistent with incremental learning of action values. Our results suggest that the capacity to modify future choices based on fictive outcomes might be shared by many different animal species, but fictive outcomes are less effective than actual outcomes in the incremental value learning system.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2015-01
Language
English
Article Type
Article
Keywords

SEQUENTIAL INVESTMENT TASK; PREFRONTAL CORTEX; DECISION-MAKING; REINFORCEMENT; OUTCOMES; MODEL; SCHEDULES; SIGNALS; POINT

Citation

SCIENTIFIC REPORTS, v.5

ISSN
2045-2322
DOI
10.1038/srep08040
URI
http://hdl.handle.net/10203/195459
Appears in Collection
BS-Journal Papers(저널논문)
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