Abstract
Subjects were exposed to the continuous projective transformations associated with a circle caused to oscillate about its vertical axis. The are of oscillation was varied and the subjects were required to choose among three alternative descriptions of the appearance of the display during designated segments of the arc of oscillation. There were two principal findings: (1) The subjects divided their responses among descriptions of rigid motion, descriptions of nonrigid motion, and descriptions of concurrent rigid and nonrigid motion. (2) Two indices of perceptual stability showed that the subjects’ descriptions did not remain constant for constant optical input. These results are considered in the context of the major theoretical treatments of the perception of structure and depth from motion.
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Epstein, W., Park, K. Continuous optical transformations do not elicit unique perceptual descriptions. Perception & Psychophysics 40, 365–369 (1986). https://doi.org/10.3758/BF03208195
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DOI: https://doi.org/10.3758/BF03208195