Bias to Experience Approaching Motion in a Three-Dimensional Virtual Environment

We used two-frame apparent motion in a three-dimensional virtual environment to test whether observers had biases to experience approaching or receding motion in depth. Observers viewed a tunnel of tiles receding in depth, that moved ambiguously either toward or away from them. We found that observe...

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Bibliographic Details
Published in:Perception (London) 2004-01, Vol.33 (3), p.259-276
Main Authors: Lewis, Clifford F, McBeath, Michael K
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Biological and medical sciences
Depth Perception - physiology
Distance Perception - physiology
Female
Form Perception - physiology
Fundamental and applied biological sciences. Psychology
Humans
Male
Motion Perception - physiology
Perception
Photic Stimulation
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychophysics
User-Computer Interface
Vision
Vision, Binocular - physiology
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Summary:We used two-frame apparent motion in a three-dimensional virtual environment to test whether observers had biases to experience approaching or receding motion in depth. Observers viewed a tunnel of tiles receding in depth, that moved ambiguously either toward or away from them. We found that observers exhibited biases to experience approaching motion. The strengths of the biases were decreased when stimuli pointed away, but size of the display screen had no effect. Tests with diamond-shaped tiles that varied in the degree of pointing asymmetry resulted in a linear trend in which the bias was strongest for stimuli pointing toward the viewer, and weakest for stimuli pointing away. We show that the overall bias to experience approaching motion is consi'stent with a computational strategy of matching corresponding features between adjacent foreshortened stimuli in consecutive visual frames. We conclude that there are both adaptational and geometric reasons to favor the experience of approaching motion.
ISSN:0301-0066
1468-4233
DOI:10.1068/p5190