Figure 1

Sample trials of monetary incentive delay (MID) and affective incentive delay (AID) tasks under reward, punishment and neutral conditions.

Each trial consists of a cue (250 ms), an anticipatory rating task for possible feedback (until response), an anticipatory delay period (2,000–2,500 ms), a target display period (150–500 ms, adjusted according to individual mean response times) and a feedback display (MID, 1,650 ms; AID, 3,000 ms) and a consummatory rating task for the actual feedback (until response). A triangular cue indicates a positive trial, a square indicates a negative trial and a circle indicates a neutral trial. For the rating scale, 1 = “not happy at all,” 9 = “very happy.” Images applied in the AID task were drawn from the IAPS. However, the images in this figure are not from the IAPS, but are comparable to the ones used in the task. We appreciate the contribution of this figure by Mr. Weizhen Xie. Images in this figure were taken by Mr. Wiezhen Xie and coauthors.