Document Detail

Cue summation in spatial discriminations.
MedLine Citation:
PMID:  2288095     Owner:  NLM     Status:  MEDLINE    
We investigated the extent to which discrimination performance improves when more than a single cue distinguishes two patterns. When two simple gratings differ slightly in spatial frequency, orientation, and/or contrast, the performance of most observers is better in multiple-cue conditions than in single-cue conditions and by an amount indicating Euclidean summation of information. These results are shown to be consistent with discrimination models that integrate information over different, spatially selective pathways. However, little summation is found when the task requires integration of cues across widely separated spatial frequency bands. This result implies that information is integrated only over pathways tuned to a common region of the spatial frequency domain.
J P Thomas; L A Olzak
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  30     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1990  
Date Detail:
Created Date:  1991-03-22     Completed Date:  1991-03-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1865-75     Citation Subset:  IM    
Department of Psychology, University of California, Los Angeles 90024.
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MeSH Terms
Contrast Sensitivity / physiology
Discrimination (Psychology) / physiology*
Models, Neurological
Pattern Recognition, Visual / physiology*
Grant Support

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

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