Dopamine enhances model-based over model-free choice behavior.

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.

SUBMITTER: Wunderlich K 

PROVIDER: S-EPMC3417237 | biostudies-literature | 2012 Aug

REPOSITORIES: biostudies-literature