Figure 1.

Visual spatial attention behavioral paradigm. An auditory preparatory cue (“Left” or “Right”) began each trial, instructing subjects to attend a location left or right of the vertical meridian. After a stimulus-onset asynchrony (10.32 s), visual targets appeared for 100 ms centered at both locations, concurrent with an auditory report cue (“Left” or “Right”). BOLD data were acquired with TR = 2.064 s. The sample times used for analysis are marked by triangles. The figure is not drawn to scale.