Universität zu Köln

Kreutzer, Sylvia, Fink, Gereon R. ORCID: 0000-0002-8230-1856 and Weidner, Ralph ORCID: 0000-0002-4502-0166 (2015). Attention modulates visual size adaptation. J. Vision, 15 (15). ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC. ISSN 1534-7362

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Abstract

The current study determined in healthy subjects (n = 16) whether size adaptation occurs at early, i.e., preattentive, levels of processing or whether higher cognitive processes such as attention can modulate the illusion. To investigate this issue, bottom-up stimulation was kept constant across conditions by using a single adaptation display containing both small and large adapter stimuli. Subjects' attention was directed to either the large or small adapter stimulus by means of a luminance detection task. When attention was directed toward the small as compared to the large adapter, the perceived size of the subsequent target was significantly increased. Data suggest that different size adaptation effects can be induced by one and the same stimulus depending on the current allocation of attention. This indicates that size adaptation is subject to attentional modulation. These findings are in line with previous research showing that transient as well as sustained attention modulates visual features, such as contrast sensitivity and spatial frequency, and influences adaptation in other contexts, such as motion adaptation (Alais & Blake, 1999; Lankheet & Verstraten, 1995). Based on a recently suggested model (Pooresmaeili, Arrighi, Biagi, & Morrone, 2013), according to which perceptual adaptation is based on local excitation and inhibition in V1, we conclude that guiding attention can boost these local processes in one or the other direction by increasing the weight of the attended adapter. In sum, perceptual adaptation, although reflected in changes of neural activity at early levels (as shown in the aforementioned study), is nevertheless subject to higher-order modulation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kreutzer, Sylvia UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED Weidner, Ralph UNSPECIFIED orcid.org/0000-0002-4502-0166 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-419253
DOI:	10.1167/15.15.10
Journal or Publication Title:	J. Vision
Volume:	15
Number:	15
Date:	2015
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 SPATIAL-FREQUENCY; FEATURE TARGETS; PERCEIVED SIZE; RETINAL SIZE; OBJECT SIZE; HUMAN V1; CORTEX; MOTION; REPRESENTATION; THRESHOLDS Multiple languages Ophthalmology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41925