Apparent Size-Apparent Distance Relationships in Flat Stimuli

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Abstract
Os judged the apparent sizes of the “near” and “far” faces of a Necker cube and of a “cylinder” percept formed stereokinetically from a pair of overlapping flat circles rotating in the frontal plane. The “near” face with both stimuli was judged to be smaller than the “far” one. This was a constant property of the “near” face regardless of perspective reversals. These results suggest that there is a physiological mechanism for the organization of size-distance relationships.