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Expected Value, Reward Outcome, and Temporal Difference Error Representations in a Probabilistic Decision Task

Rolls, E. T., McCabe, C., Redoute, J.·2008·Cerebral Cortex

Abstract

In probabilistic decision tasks, an expected value (EV) of a choice is calculated, and after the choice has been made, this can be updated based on a temporal difference (TD) prediction error between the EV and the reward magnitude (RM) obtained. The EV is measured as the probability of obtaining a reward x RM. To understand the contribution of different brain areas to these decision-making processes, functional magnetic resonance imaging activations related to EV versus RM (or outcome) were measured in a probabilistic decision task. Activations in the medial orbitofrontal cortex were correlated with both RM and with EV and confirmed in a conjunction analysis to extend toward the pregenual cingulate cortex. From these representations, TD reward prediction errors could be produced. Activations in areas that receive from the orbitofrontal cortex including the ventral striatum, midbrain, and inferior frontal gyrus were correlated with the TD error. Activations in the anterior insula were correlated negatively with EV, occurring when low reward outcomes were expected, and also with the uncertainty of the reward, implicating this region in basic and crucial decision-making parameters, low expected outcomes, and uncertainty.

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Metadata

Authors
Rolls, E. T., McCabe, C., & Redoute, J.
Venue
Cerebral Cortex
Published
2007-06-22
Volume
18
Issue
3
Pages
652-663
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2120652175
Cited by
236
References
28
FWCI
11.29
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Expected Value, Reward Outcome, and Temporal Difference Error Representations in a Probabilistic Decision Task. https://app.cochat.ai/papers/10.1093/cercor/bhm097
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Rolls, E. T., McCabe, C., & Redoute, J. (2008). Expected Value, Reward Outcome, and Temporal Difference Error Representations in a Probabilistic Decision Task. Cerebral Cortex. https://doi.org/10.1093/cercor/bhm097

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