Figure 1.

Example MOT trial. Each trial began with a cueing period (2 s; targets = green, distractors = white), which was followed by a period of active endogenous attentional tracking (14 s; all stimuli white), a response phase (2 s; green stimulus = tracked target or distractor?), and a feedback period (2 s; correct response = green, incorrect response = red). During the tracking period, IAPS images appeared at intervals in the center of the screen, represented by the area outlined in gray (rectangle not actually shown during the experiment).