Fig. 2

Practice phase. a If the participant is presented with the target stimulus (in the example above, the target stimulus is a neutral IAPS picture), the participant will judge if the stimulus is shorter or longer than the standard duration. In the example above, the participant should press the right button on the mouse to indicate that the duration was longer than the standard stimulus duration. b If the participant is presented with the nontarget stimulus (the gray oval used in the learning phase), the participant will inhibit any response and wait for the next stimulus presentation