Document Detail

Stimulus-determined discrimination mechanisms for color search.
MedLine Citation:
PMID:  10497425     Owner:  NLM     Status:  MEDLINE    
Visual attention can be goal driven, stimulus driven, or a combination of the two. Here we report evidence for an unexpectedly stimulus-driven component of visual search for a target defined by color. Observers demonstrated a surprisingly cost-free ability to incorporate multiple classifiers in search for a target of one color from among distractors of other colors. A target color was presented among distractors that could change from trial to trial (intermixed presentation) or that remained constant across all trials in a block (blocked presentation). For blocked presentation, a single search classifier (a mechanism that segregates the target from distractors in color space) could be adopted, whereas for intermixed presentation different classifiers had to be used when the distractor colors changed. The benefit of blocked presentation was very small, suggesting that the appropriate classifier was determined very quickly in trials for which the classifier changed. The results suggest that the stimulus-driven activation of an appropriate stimulus classifier can be very efficient.
E S Olds; W B Cowan; P Jolicoeur
Related Documents :
18345105 - Optimization of resolution and color reproduction by controlling luminance and contrast...
17174655 - Comparison of the shade matching ability of dental students using two light sources.
8333175 - Induced contrast from radial patterns.
14342375 - Visual-reinforcer color, and operant behavior in siamese fighting fish.
21354285 - Relations between perceptual measures of temporal processing, auditory-evoked brainstem...
20111615 - Protective effects of n-acetylcysteine on noise-induced hearing loss in guinea pigs.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception & psychophysics     Volume:  61     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  1999 Aug 
Date Detail:
Created Date:  1999-11-02     Completed Date:  1999-11-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1038-45     Citation Subset:  IM    
University of Waterloo, Ontario, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Color Perception*
Depth Perception
Discrimination Learning*
Pattern Recognition, Visual*
Reaction Time

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

Previous Document:  Unmasking the inhibition of return phenomenon.
Next Document:  Inhibition of return is composed of attentional and oculomotor processes.