Wunderlich, Klaus and Symmonds, Mkael and Bossaerts, Peter and Dolan, Raymond J. (2011) Hedging Your Bets by Learning Reward Correlations in the Human Brain. Neuron, 71 (6). pp. 1141-1152. ISSN 0896-6273 http://resolver.caltech.edu/CaltechAUTHORS:20111024-101009342
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Human subjects are proficient at tracking the mean and variance of rewards and updating these via prediction errors. Here, we addressed whether humans can also learn about higher-order relationships between distinct environmental outcomes, a defining ecological feature of contexts where multiple sources of rewards are available. By manipulating the degree to which distinct outcomes are correlated, we show that subjects implemented an explicit model-based strategy to learn the associated outcome correlations and were adept in using that information to dynamically adjust their choices in a task that required a minimization of outcome variance. Importantly, the experimentally generated outcome correlations were explicitly represented neuronally in right midinsula with a learning prediction error signal expressed in rostral anterior cingulate cortex. Thus, our data show that the human brain represents higher-order correlation structures between rewards, a core adaptive ability whose immediate benefit is optimized sampling.
|Additional Information:||© 2011 Elsevier Inc. Accepted 28 July 2011. Published: September 21, 2011. Available online 21 September 2011. This study was supported by a Wellcome Trust Program Grant and Max Planck Award.|
|Official Citation:||Klaus Wunderlich, Mkael Symmonds, Peter Bossaerts, Raymond J. Dolan, Hedging Your Bets by Learning Reward Correlations in the Human Brain, Neuron, Volume 71, Issue 6, 22 September 2011, Pages 1141-1152, ISSN 0896-6273, 10.1016/j.neuron.2011.07.025.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||24 Oct 2011 20:21|
|Last Modified:||24 Oct 2011 20:21|
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