Visual coding of human bodies: perceptual aftereffects reveal norm-based, opponent coding of body identity.

Autor: Rhodes G; School of Psychology, University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia. gillian.rhodes@uwa.edu.au, Jeffery L, Boeing A, Calder AJ
Jazyk: angličtina
Zdroj: Journal of experimental psychology. Human perception and performance [J Exp Psychol Hum Percept Perform] 2013 Apr; Vol. 39 (2), pp. 313-7. Date of Electronic Publication: 2013 Feb 11.
DOI: 10.1037/a0031568
Abstrakt: Despite the discovery of body-selective neural areas in occipitotemporal cortex, little is known about how bodies are visually coded. We used perceptual adaptation to determine how body identity is coded. Brief exposure to a body (e.g., anti-Rose) biased perception toward an identity with opposite properties (Rose). Moreover, the size of this aftereffect increased with adaptor extremity, as predicted by norm-based, opponent coding of body identity. A size change between adapt and test bodies minimized the effects of low-level, retinotopic adaptation. These results demonstrate that body identity, like face identity, is opponent coded in higher-level vision. More generally, they show that a norm-based multidimensional framework, which is well established for face perception, may provide a powerful framework for understanding body perception.
Databáze: MEDLINE