Appendix S1 Instructions for the adapted probabilistic selection task.

Appendix S2 Instructions of valuation.

Appendix S3 Confidence ratings as covariate.

Fig. S1 Visual analogue scale: assessment of learning. First, subjects estimate the contingency for the specific cue (shown on top). Second, they indicate how sure they are of this estimate.

Table S1 In- and exclusion criteria for Parkinson’s disease patients.

Table S2 Dopaminergic medication of all Parkinson’s disease patients individually.

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