Document Detail


Pre-exposure to contrast selectively compresses the achromatic half-axes of color space.
MedLine Citation:
PMID:  10996612     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The gamut of perceived colors can be represented in a space with bright-dark, red-green and blue-yellow axes. Pre-exposure to a field that changes periodically over time in luminance or along one of the color axes reduces vividness of colors along the entire axis [Webster and Mollon (1991) Nature, 349, 235-238]. But is it possible to reduce vividness or perceived contrast selectively for half-axes in color space? We assessed such selective compression of the bright-dark axis using a task where subjects matched tests in a pre-adapted region to ones in an un-adapted region. Tests were bright or dark pinstripes on a gray background, and pre-exposure was to multiple drifting pinstripes. Matches made after pre-exposure indicate a combination of symmetric and asymmetric compression, with more compression when adapting and test stimulus were similar in contrast polarity.
Authors:
R D Beer; D I MacLeod
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  40     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2000  
Date Detail:
Created Date:  2000-11-09     Completed Date:  2000-11-09     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  3083-8     Citation Subset:  IM    
Affiliation:
Department of Psychology, University of California at San Diego, 92093-0109, La Jolla, CA, USA.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Ocular / physiology
Color Perception / physiology*
Contrast Sensitivity / physiology*
Humans
Visual Pathways / physiology

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