Figure 10. Experimental paradigm of experiment 4.

(A) Example trial of experiment 4. Each trial started with a fixation cross, followed by the stimulus (three choice options; until the subject made a choice, up to 3 s), a brief highlight of the choice, and the choice’s reward was shown. (B) Reward contingencies for the target stimulus and two distractors per condition. Percentages indicate the probability of receiving +100 points (+0 otherwise). Presented symbols are examples, the actual symbols differed per block and participant (counterbalanced to prevent potential item effects from confounding the learning process).