PERCEPTION OF DEPTH - PROCESSING OF SIMPLE POSITIONAL DISPARITY AS A FUNCTION OF VIEWING DISTANCE

Dependency of perceived depth (relative to the fixation point) on disparity, viewing distance, and the type of the stereoscopic stimulus was investigated. Nearly complete constancy of depth, as required for a veridically matched perception, was observed only at small disparity values and with the larger square-formed stimulus; under these conditions, perceived depth corresponded well with real depth intervals for close viewing distances. Additionally, a model for perceptual processing of both variables, disparity and viewing distance, was applied to the data. © 1979 Psychonomic Society, Inc.