Dissociation Between Location and Shape in Visual Space

Overview

Journal J Exp Psychol Hum Percept Perform

Specialty Psychology

Date 2002 Nov 8

PMID 12421065

Citations 26

Authors

Jack M Loomis

John W Philbeck

Pavel Zahorik

Affiliations

Soon will be listed here.

Abstract

There are often large perceptual distortions of shapes lying on the ground plane, even in well-lit environments. These distortions occur under conditions for which the perception of location i saccurate. Four hypotheses are considered for reconciling these seemingly paradoxical results, after which 2 experiments are reported that lend further support to 1 of them--that perception of shapeand perception of location are sometimes dissociable. The 2 experiments show that whereas perception of location does not depend on whether viewing is monocular or binocular (when other distance cues are abundant), perception of shape becomes more veridical when viewing is binocular. This means that perception of shape is not fully constrained by the perceived locations of the vertices that define the shape.

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