Figure 1

Gambling task design. Two boxes labeled A and B (angle of field, 2.62° × 3.59; interval between boxes, 2.76°) were displayed on the monitor. Each time the participant pressed a button to choose either A or B, a monetary gain or loss image was presented 500 ms after the choice on the monitor for 1000 ms. Each image (gain or loss) trial was performed 100 times, respectively, for a total of 200 images presented.