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Time course of the trial-by-trial decision certainty, plotted relative to rule reversals (averaged across all 18 reversals). Trial 0 is the trial at which the alternative response is selected for the first time following a rule reversal. Subjects in the HP condition rapidly regain prereversal levels of certainty while this takes longer in the LP condition. In the LP condition, certainty generally remains at a lower level than in the HP condition (p < 0.05 at all time points).
