THE EFFECTS OF MOTION ADAPTATION AND DISPARITY IN MOTION INTEGRATION

Two experiments examined the effects of pattern vs component adaptatio n on motion integration in stimuli with or without disparity. Observer s adapted to either downward pattern motion, downward component motion , or a grey screen, and were then tested with plaids containing either crossed, uncrossed or zero binocular disparity, moving downward. In a second experiment, the same test conditions were employed following a daptation to upward pattern motion. The total amount of time that cohe rence or transparent sliding was perceived was measured. Adaptation to component motion increased the amount of perceived coherent motion wh ereas adaptation to pattern motion decreased it. The second experiment revealed that adaptation to the upward-moving pattern had no effect o n perceived coherence. The results demonstrate the complex nature of t he interaction between depth and motion mechanisms in motion integrati on.