Fig. 9.

Apparent separation of colinear half-bars presented at various positions with a 75 msec asynchrony, at various (randomized) delays of the first bar relative to the onset of a 20° horizontal saccade. Although physically colinear, the bars appeared to be offset over much of the range of delays. The direction of the offset depended on spatial position. At 0 and −7°, the displacement was initially positive (meaning that the second bar was displaced in the direction of the saccade), becoming negative as time progressed. At 20°, the pattern of results was reversed (although somewhat noisier). At 10°, the saccadic target, there was very little displacement in either direction. Note that for t < −75 msec, both bars were presented to the same physical position on stationary retinas.