Fig. 6.

Task design. After touching a bar, the acquisition of fixation, and a pre-stimulus baseline interval of 0.8 s, two isoluminant and isoeccentric stimuli were presented. In each trial, the light grating stripes of one stimulus were slightly tinted yellow, and the stripes of the other stimulus were slightly tinted blue, assigned randomly. After a variable amount of time (0.8–1.3 s), the color of the fixation point changed to blue or yellow, indicating the stimulus with the corresponding color to be the behaviorally relevant (attended) one. We analyzed data averaged across both attention conditions starting 0.3 s after cue onset until the first shape change in one of the stimuli. See Methods for details.