Document Detail

Neuroelectric concepts: form-color classification.
MedLine Citation:
PMID:  7619089     Owner:  NLM     Status:  MEDLINE    
Visual event-related potentials (VEPs) were recorded from the scalp of human observers who viewed an orthogonal stimulus set, consisting of four stimuli, each of which had two attributes: a form (circle or triangle) and a color (green or red). The stimulus set was represented by an a priori stimulus classification model, defined by positions (i.e., degrees of arc) on a unit circle that specified the relationships among the form and color features. An analysis of VEP deviation waveshapes (delta VEP: deviations around average VEP for each electrode) showed that the a priori unit circle model predicted morphologies of the delta VEP waveshapes, as well as the overall relationships between waveshapes obtained for the form and the color attributes. Further analyses demonstrated that individual delta VEP waveshapes for color and for form were located on the circumference of a unit circle at the positions (angle) specified by the a priori model. The studies show that formal modeling of the way humans classify stimulus attributes provides a quantitative and predictive model of the way VEPs become classified and organized according to psychological principles.
W J Hudspeth
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Brain and cognition     Volume:  21     ISSN:  0278-2626     ISO Abbreviation:  Brain Cogn     Publication Date:  1993 Mar 
Date Detail:
Created Date:  1993-04-02     Completed Date:  1993-04-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8218014     Medline TA:  Brain Cogn     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  226-46     Citation Subset:  IM; S    
Neuropsychometrics Laboratory, Radford University, VA.
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MeSH Terms
Color Perception / physiology*
Evoked Potentials, Visual
Pattern Recognition, Visual / physiology*
Photic Stimulation
Visual Perception / physiology*
Comment In:
Brain Cogn. 1995 Feb;27(1):98-111; discussion 112-27   [PMID:  7748548 ]

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