Dopamine Enhances Model-Based over Model-Free Choice Behavior |
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Authors: | Klaus Wunderlich Peter Smittenaar Raymond J Dolan |
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Institution: | Wellcome Trust Centre for Neuroimaging, University College London, London WC1N 3BG, UK. |
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Abstract: | Decision making is often considered to arise out of contributions from a model-free habitual system and a model-based goal-directed system. Here, we investigated the effect of a dopamine manipulation on the degree to which either system contributes to instrumental behavior in a two-stage Markov decision task, which has been shown to discriminate model-free from model-based control. We found increased dopamine levels promote model-based over model-free choice. |
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