Abstract

The following procedure produces a new motion aftereffect. Two visually textured disks—one fine and the other coarse—rotate in opposite directions, and the O fixates the center of each disk alternately for 4 sec. After 4 min of viewing, the disks are stopped. Each stationary disk, when fixated, then appears to rotate in the opposite direction from its prior objective rotation. This phenomenon, a texture-contingent negative motion aftereffect, is analogous in some respects to the McCollough effect, an orientation-contingent color aftereffect.

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