Stereoscopic depth cues can segment motion information.
Can the motion system selectively process elements at a particular depth? We attempted to answer this question using global coherence tasks in which signal and noise elements could be given different disparities. In experiment 1 we found that, if all the signal elements had a disparity different from that of the noise elements, performance was far better than when they had the same disparity (at least for stereo-normal observers). In a second experiment we found that adding additional noise elements to the motion task had no effect if they had a different disparity (however, they had a marked effect for stereo-blind observers). We conclude that stereo disparity can be used as a segmentation cue by the motion system.
Snowden
R J
RJ
School of Psychology, Cardiff University, UK. snowden@cardiff.ac.uk
Rossiter
M C
MC
D003118:Color Perception; D003463:Cues; D003867:Depth Perception; D006801:Humans; D009039:Motion Perception; D011581:Psychological Tests; D015348:Vision, Binocular / Q000502:physiology*