Abstract
The possibility that changes in perceived stereoscopic depth resulting from interocular delays in stimulation are due to small increases in the convergence of the eyes during the delay intervals was examined. An indirect method involving the measurement of fixation disparity was used to indicate possible convergence movements. It was found that the magnitude of the shift in perceived stereoscopic depth increased with increasing interocular delay interval as did the magnitude of convergence, but that the magnitude of the former was twice that of the latter. Therefore, the possibility that convergence shifts were responsible for depth shifts was ruled out. The alternative hypothesis that such depth shifts are the result of a central equivalency of binocular disparity and temporal disparity is consequently still tenable.
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References
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This research was supported by Grant EY00268 from the National Eye Research Institute of the U.S. Public Health Service. This report was written while the author was a “Senior U.S. Scientist Awardee of the Alexander von Humboldt Foundation” at the Department of Neurophysiology, University of Freiburg, West Germany.
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Wist, E.R. Convergence and stereoscopic depth shifts produced by interocular delays in stimulation. Bull. Psychon. Soc. 5, 251–253 (1975). https://doi.org/10.3758/BF03337623
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DOI: https://doi.org/10.3758/BF03337623