Figure 1. Example screen events from the behavioral task.

(A) On each trial, the participant sees a stimulus and is asked to categorize that stimulus as “A” or “B”. The chosen category is circled, and corrective feedback may appear. For some stimuli (punishment trials), incorrect classification is punished with point loss (B) while correct classification receives no feedback (C); for other stimuli (reward trials), correct classification is rewarded with point gain (D) while incorrect classification receives no feedback. The task is probabilistic, so a stimulus does not belong to the same category on every trial (refer Table 1).