Abstract
Four experiments were conducted to examine the transition of depth selection by mutual inhibition among disparities. (a) With random-dot stereograms, the time required for stereoscopic depth disappearance under fixation was found to be an inverse function of the magnitude of disparity. (b) Measurement of the cumulative time for perception of ambiguous stereograms showed that the depth was perceived longer with relatively smaller disparity. (c) The perception of stereoscopic depth under fixation was more stable in random-dot target than in ambiguous target. (d) Stereoscopic depth reversal occurred more frequently under fixation than in free observation. These results suggest that the whole range of disparities might be detected simultaneously and that the inhibition mechanism might have some important role in stereopsis.
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