Figure 2

Schematic of the visual stimuli (repeated S1-S2 sequence). The imperative signal (S2) was presented at 9° to the left or right of the fixation point. The interval between S2 and the next cue signal (S1) was 1.0, 1.5, or 2.0 s. The S2-S1 interval was set as constant within each condition and changed among conditions to manipulate the time pressure. Within each block, the presentation of stimuli to the right and left of the fixation point and the presentation of target and non-target S2 stimuli were random.