Document Detail

Conjunction of color and form without attention: evidence from an orientation-contingent color aftereffect.
MedLine Citation:
PMID:  2940323     Owner:  NLM     Status:  MEDLINE    
According to feature-integration theory (Treisman & Gelade, 1980), separable features such as color and shape exist in separate maps in preattentive vision and can be integrated only through the use of spatial attention. Many perceptual aftereffects, however, which are also assumed to reflect the features available in preattentive vision, are sensitive to conjunctions of features. One possible resolution of these views holds that adaptation to conjunctions depends on spatial attention. We tested this proposition by presenting observers with gratings varying in color and orientation. The resulting McCollough aftereffects were independent of whether the adaptation stimuli were presented inside or outside of the focus of spatial attention. Therefore, color and shape appear to be conjoined preattentively, when perceptual aftereffects are used as the measure. These same stimuli, however, appeared to be separable in two additional experiments that required observers to search for gratings of a specified color and orientation. These results show that different experimental procedures may be tapping into different stages of preattentive vision.
M R Houck; J E Hoffman
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  12     ISSN:  0096-1523     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  1986 May 
Date Detail:
Created Date:  1986-07-03     Completed Date:  1986-07-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  186-99     Citation Subset:  IM    
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MeSH Terms
Color Perception*
Figural Aftereffect*
Form Perception*
Mental Recall
Pattern Recognition, Visual
Set (Psychology)
Space Perception

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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