Dopamine Enhances Model-Free Credit Assignment Through Boosting of Retrospective Model-Based Inference

      Dopamine is implicated in signalling model-free (MF) reward prediction errors and various aspects of model-based (MB) planning and choice. Recently, we showed that cooperative interactions between MB and MF systems include guidance of MF credit assignment by MB inference. Here, we test a novel hypothesis that enhancing dopamine levels boosts the guidance of MF credit assignment via MB inference.
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