Perceiving self-motion in depth: the role of stereoscopic motion and changing-size cues.
During self-motions, different patterns of optic flow are presented to the left and right eyes. Previous research has, however, focused mainly on the self-motion information contained in a single pattern of optic flow. The present experiments investigated the role that binocular disparity plays in the visual perception of self-motion, showing that the addition of stereoscopic cues to optic flow significantly improves forward linear vection in central vision. Improvements were also achieved by adding changing-size cues to sparse (but not dense) flow patterns. These findings showed that assumptions in the heading literature that stereoscopic cues facilitate self-motion only when the optic flow has ambiguous depth ordering do not apply to vection. Rather, it was concluded that both stereoscopic and changing-size cues provide additional motion-in-depth information that is used in perceiving self-motion.
Palmisano
S
S
School of Psychology, University of New South Wales, Kensington, Australia. s.palmisano@unsw.edu.au
D000293:Adolescent; D000328:Adult; D001288:Attention; D003867:Depth Perception; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D007699:Kinesthesis; D008297:Male; D009039:Motion Perception; D009949:Orientation; D010775:Photic Stimulation; D011601:Psychophysics; D012858:Size Perception