Document Detail

Sustained and transient properties of chromatic and luminance systems.
MedLine Citation:
PMID:  1509696     Owner:  NLM     Status:  MEDLINE    
Reaction times were measured to 450 and 650 mm test increments to examine the temporal behavior of the chromatic and luminance systems. A response-terminated random foreperiod paradigm was employed. Stimuli consisted of chromatic test increments upon backgrounds of varying spatial structure. Conditions were chosen which may preferentially favor the reaction time response being mediated by the chromatic or luminance systems. The temporal properties of the chromatic and luminance systems were demonstrated by the shape of the estimated hazard functions of the reaction time distributions. When the white background was spatially coincident with the test field, the hazard functions showed a relatively small peak. As white sectors were added to the annulus surround (introducing spatial transients between test and background fields), however, the hazard functions became more and more peaked. The hazard functions of the luminance system were estimated by assuming that the chromatic and luminance systems function in parallel. We concluded from the results that the chromatic system may be characterized as a quasi-sustained mechanism and the luminance system as a transient mechanism.
T Ueno
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  32     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1992 Jun 
Date Detail:
Created Date:  1992-09-24     Completed Date:  1992-09-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1055-65     Citation Subset:  IM; S    
Department of Psychology, Faculty of Letters, Osaka City University, Japan.
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MeSH Terms
Color Perception / physiology*
Models, Psychological
Reaction Time / physiology*
Visual Perception / physiology*

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