Champion R A, Simmons D R, Mamassian P, 2004, "The influence of object size and surface shape on shape constancy from stereo" Perception 33(2) 237 – 247
Download citation data in RIS format
The influence of object size and surface shape on shape constancy from stereo
Rebecca A Champion, David R Simmons, Pascal Mamassian
Abstract. The failure of shape constancy from stereoscopic information is widely reported in the literature. In this study we investigate how shape constancy is influenced by the size of the object and by the shape of the object's surface. Participants performed a shape-judgment task on objects of five sizes with three different surface shapes. The shapes used were: a frontoparallel rectangle, a triangular ridge surface, and a cylindrical surface, all of which contained the same maximum depth information, but different variations in depth across the surface. The results showed that, generally, small objects appear stretched and large objects appear squashed along the depth dimension. We also found a larger variance in shape judgments for rectangular stimuli than for cylindrical and ridge-shaped stimuli, suggesting that, when performing shape judgments with cylindrical and ridge-shaped stimuli, observers rely on a higher-order shape representation.
Full-text PDF size: 289 Kb
References 22 references, 11 with DOI links ()
Your computer (IP address: 18.104.22.168) has not been recognised as being on a network authorised to view the full text or references of this article. If you are a member of a university library that has a subscription to the journal, please contact your serials librarian (subscriptions information).