Two stimuli, one of which is neutral and one of which is threatening, appear randomly on either side of the screen. The stimuli are presented for a predetermined length of time (most commonly 500ms), before a dot is presented in the location of one former stimulus. Participants are instructed to indicate the location of this dot as quickly as possible, either via keyboard or response box.
In this experiment, two visual signals, one neutral and one threatening, appear randomly on either side of the screen. The stimuli are displayed for a fixed period (typically 500ms), followed by a dot appearing in the location of one former stimulus. Participants respond as quickly as possible to indicate the dot's location using a keyboard or response box.