Surprised at all the entropy: hippocampal, caudate and midbrain contributions to learning from prediction errors.

Activity in the caudate ROI for the modeling of surprise (as defined by information theory) during the observation of unpredictables approached significance at p = .054 (t = 2.98;t crit 5% = 3.00; t crit 10% = 2.73, p<0.1) 2.5 Orthogonal modeling results Modeling entropy yielded replication of the former significant result for the hippocampus ROI during the observation of unpredictables (t = 1.83; t crit 5% = 1.50).

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