Document Detail

Spatial asymmetries in tactile discrimination of line orientation: a comparison of the sighted, visually impaired, and blind.
MedLine Citation:
PMID:  3249665     Owner:  NLM     Status:  MEDLINE    
Thresholds for tactile discrimination of stimulus orientation discrepancy from standard or referent vertical, horizontal, and diagonal orientations were determined for sighted, visually impaired, and blind subject groups. The stimuli were presented to the ventral distal portion of the tip of the subject's left index finger via an Optacon. Although the subject groups did not differ in overall discrimination accuracy, for each group the deviations from vertical and horizontal standard orientations were discriminated reliably more accurately than the deviations from standard diagonals, ie the oblique effect was obtained. The bases for this tactual spatial anisotrophic effect appear to reflect both sensory--neurological and experiential factors.
E C Lechelt
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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:  579-85     Citation Subset:  IM    
Department of Psychology, University of Alberta, Edmonton, Canada.
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MeSH Terms
Blindness / psychology*
Discrimination Learning*
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