Universität zu Köln

Zeng, Hang ORCID: 0000-0002-8836-1032, Kreutzer, Sylvia, Fink, Gereon R. ORCID: 0000-0002-8230-1856 and Weidner, Ralph (2017). The source of visual size adaptation. J. Vision, 17 (14). ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC. ISSN 1534-7362

Full text not available from this repository.

Abstract

Size adaptation describes the tendency of the visual system to adjust neural responsiveness of size representations after prolonged exposure to particular stimulations. A larger (or smaller) adaptor stimulus influences the perceived size of a similar test stimulus shown subsequently. Size adaptation may emerge on various processing levels. Functional representations of the adaptor to which the upcoming stimulus is adapted may be coded early in the visual system mainly reflecting retinal size. Alternatively, size adaptation may involve higher order processes that take into account additional information such as an object's estimated distance from the observer, hence reflecting perceived size. The present study investigated whether size adaptation is based on the retinal or the perceived size of an adaptor stimulus. A stimulus' physical and perceived sizes were orthogonally varied using perceived depth via binocular disparity, employing polarized 3D glasses. Four different adaptors were used, which varied in physical size, perceived size, or both. Two pairs of adaptors which were identical in physical size did not cause significantly different adaptation effects although they elicited different perceived sizes which were sufficiently large to produce differential aftereffects when induced by stimuli that physically differed in size. In contrast, there was a significant aftereffect when adaptors differed in physical size but were matched in perceived size. Size adaptation was thus unaffected by perceived size and binocular disparity. Our data suggest that size adaptation emerges from neural stages where information from both eyes is still coded in separate channels without binocular interactions, such as the lateral geniculate nucleus.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zeng, Hang UNSPECIFIED orcid.org/0000-0002-8836-1032 UNSPECIFIED Kreutzer, Sylvia UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED Weidner, Ralph UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-210283
DOI:	10.1167/17.14.8
Journal or Publication Title:	J. Vision
Volume:	17
Number:	14
Date:	2017
Publisher:	ASSOC RESEARCH VISION OPHTHALMOLOGY INC
Place of Publication:	ROCKVILLE
ISSN:	1534-7362
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language V1; DISCRIMINATION; REPRESENTATION; MECHANISMS; PHYSIOLOGY; ABSOLUTE; DISTANCE; ILLUSION; PREDICTS; AREA Multiple languages Ophthalmology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21028