Fig. 1.

Wisconsin Card Sorting Test paradigm. Each trial starts with the presentation of a new card followed by an individual response period during which participants decide on the sorting rule. Directly after their responses, participants are informed if the response was correct or incorrect. For group analyses, 4 different events were defined: (A) receiving negative feedback, indicating that a shift is required; (B) matching after negative feedback (i.e., the execution after the required set shift); (C) receiving positive feedback, indicating that the current matching criterion is still adequate; and (D) matching after positive feedback (i.e., the execution of matching according to the current rule).