Document Detail

On the scaling of size judgements by orientational cues.
MedLine Citation:
PMID:  1455717     Owner:  NLM     Status:  MEDLINE    
Observers carried out multiple, concurrent size discriminations with a range of size standards. The task was to classify each stimulus as larger or smaller than the appropriate standard size for the set to which it belonged. The set to which each stimulus belonged was indicated by its orientation, or in different experiments, by its spatial location. Observers were able to maintain appropriate discrimination, both when there were four concurrent standards and when there were eight. Both angle and position functioned as effective cues. The size of the orientational cue appeared to make little difference to the efficiency of discrimination. However, when the relationship between standard size and orientation was random, rather than regular, performance got worse. The analogy between such discrimination and size constancy is pointed out, and the results are discussed in relation to Andrews, D. P.'s [(1964) Quarterly Journal of Experimental Psychology, 16, 104-115)] account of perceptual calibration.
M J Morgan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  32     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1992 Aug 
Date Detail:
Created Date:  1993-01-06     Completed Date:  1993-01-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1433-45     Citation Subset:  IM    
Laboratory for Neuroscience, University of Edinburgh, Scotland.
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MeSH Terms
Discrimination (Psychology) / physiology
Sensory Thresholds / physiology
Size Perception / physiology*

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