A TEST OF THE EXISTENCE OF MONOCULAR STEREOSCOPIC DEPTH PERCEPTION.
DEFENCE RESEARCH MEDICAL LABS TORONTO (ONTARIO)
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Three Os, highly trained in observing visual phenomena, viewed a pair of Julesz Stereo Random Brightness Fields presented alternately to the same eye. Under no circumstances was there any report of stereoscopic depth arising from this mode of presentation. This finding contradicts recent reports of monocular stereoscopy obtained by alternately presenting both halves of a stereo pair to the same eye. It is concluded that impressions of depth gained in this way are not due to stereopsis but to the presence of monocular depth cues in the stimuli. Stereoscopic stimuli, such as Random Brightness Fields, which contain no monocular depth cues, do not give rise to the perception of depth. Author