Figure 1.

Task design for social trials in which (a) the target is ‘hit' (button press before target disappears) and positive social feedback is provided (ie, video of investigator giving thumbs up), and (b) the target is ‘missed' (button press after target disappears) and negative social feedback is provided (ie, video of investigator giving thumbs down).The task was designed so that participants should get positive feedback in ~2/3 of the trials (target duration up to 500 ms) and negative feedback in ~1/3 of the trials (target duration up to 160 ms). The cue was presented at the beginning of each trial for 1 s. The target was presented for either 160 or 500 ms. Feedback was presented for 2.0 s.