Document Detail

Spatial frequency discrimination: visual long-term memory or criterion setting?
MedLine Citation:
PMID:  9536378     Owner:  NLM     Status:  MEDLINE    
A long-term sensory memory is believed to account for spatial frequency discrimination when reference and test stimuli are separated by long intervals. We test an alternative proposal: that discrimination is determined by the range of test stimuli, through their entrainment of criterion-setting processes. Experiments 1 and 2 show that the 50% point of the psychometric function is largely determined by the midpoint of the stimulus range, not by the reference stimulus. Experiment 3 shows that discrimination of spatial frequencies is similarly affected by orthogonal contextual stimuli and parallel contextual stimuli and that these effects can be explained by criterion-setting processes. These findings support the hypothesis that discrimination over long intervals is explained by the operation of criterion-setting processes rather than by long-term sensory retention of a neural representation of the stimulus.
M Lages; M Treisman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  38     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1998 Feb 
Date Detail:
Created Date:  1998-04-15     Completed Date:  1998-04-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  557-72     Citation Subset:  IM    
Department of Experimental Psychology, Oxford University, U.K.
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MeSH Terms
Discrimination (Psychology) / physiology
Memory / physiology*
Pattern Recognition, Visual / physiology*
Time Factors

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