Document Detail

The effect of feature uncertainty on spatial discriminations.
MedLine Citation:
PMID:  3249664     Owner:  NLM     Status:  MEDLINE    
Just noticeable differences (JNDs) in orientation and spatial frequency were measured under two conditions. In one condition the subject was cued before stimulus presentation as to the feature to be discriminated on that trial, while in the other condition the subject was cued only after stimulus offset. JNDs were larger in the latter, feature uncertainty, condition. This feature uncertainty effect increased with decreasing stimulus processing time. The results suggest that this feature uncertainty effect is of sensorial origin. They also demonstrate that it is possible for humans to address selectively those mechanisms that are most relevant for a given discrimination task.
R Vogels; H Eeckhout; G A Orban
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  17     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  1988  
Date Detail:
Created Date:  1989-06-23     Completed Date:  1989-06-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  565-77     Citation Subset:  IM    
Laboratorium voor Neuro- en Psychofysiologie, Katholieke Universiteit te Leuven, Belgium.
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MeSH Terms
Differential Threshold
Discrimination Learning*
Form Perception*
Pattern Recognition, Visual*
Perceptual Masking
Space Perception*

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