Fig. 1.

Typical trial sequence. During the reversal learning gambling task participants either choose a high or low amount. After a 500-ms delay feedback is shown whether the amount has been won (the chosen value turns green) or lost (the chosen value turns red). The amount that has not been chosen also turns red or green to provide additional feedback. Finally, the total score so far is shown. The yellow rectangles indicate the participant’s choice. Note that these rectangles are only displayed in this figure for illustrational purposes and are not displayed during the actual task. In this particular example, the participant has chosen the low amount (left button-press) and has lost