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Model-based influences on humans' choices and striatal prediction errors.

Daw, ND and Gershman, SJ and Seymour, B and Dayan, P and Dolan, RJ (2011) Model-based influences on humans' choices and striatal prediction errors. Neuron, 69. pp. 1204-1215.

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Abstract

The mesostriatal dopamine system is prominently implicated in model-free reinforcement learning, with fMRI BOLD signals in ventral striatum notably covarying with model-free prediction errors. However, latent learning and devaluation studies show that behavior also shows hallmarks of model-based planning, and the interaction between model-based and model-free values, prediction errors, and preferences is underexplored. We designed a multistep decision task in which model-based and model-free influences on human choice behavior could be distinguished. By showing that choices reflected both influences we could then test the purity of the ventral striatal BOLD signal as a model-free report. Contrary to expectations, the signal reflected both model-free and model-based predictions in proportions matching those that best explained choice behavior. These results challenge the notion of a separate model-free learner and suggest a more integrated computational architecture for high-level human decision-making.

Item Type: Article
Uncontrolled Keywords: Adult Basal Ganglia Brain Mapping Choice Behavior Dopamine Female Humans Logistic Models Magnetic Resonance Imaging Male Models, Neurological Neurons Neuropsychological Tests Reinforcement (Psychology)
Subjects: UNSPECIFIED
Divisions: Div F > Computational and Biological Learning
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:21
Last Modified: 20 Oct 2014 01:07
DOI: 10.1016/j.neuron.2011.02.027

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