Figure 2.

Horizontal viewing positions of the left and the right eye on the screen in a valid (left panel) and invalid (right panel) trial. Fixations (blue) and saccades are highlighted in different color. The black line represents the position of the fixation/target stimulus on the screen. The target appeared to the left of the fixation stimulus in both trials. The left panel shows a valid first saccade (green), the time window that was employed to determine the landing position of the initial saccade (yellow), and a late saccades (pink). The right panel shows an early “anticipatory” saccade before target onset. The first saccade after target onset was classified as invalid.