Document Detail

Resistance to extinction as a function of IQ and reinforcement ratio among retarded children.
MedLine Citation:
PMID:  1271454     Owner:  NLM     Status:  MEDLINE    
Children at three levels of mental retardation (IQ ranges of 50-60, 30-40 and 20-below) were trained to bar-press on one of two variable ratio (V.R.) schedules. Responses were reinforced twenty-five times on either a V.R.2 or V.R.4 schedule. Analysis of the number of responses during extinction indicated an inverse relationship between IQ and resistance to extinction. The period reinforcement extinction effect was found, but there was no interaction with IQ level. The results support the position that inhibitory control is an important parameter along which intelligence may be ordered.
B A Levine
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of mental deficiency research     Volume:  20     ISSN:  0022-264X     ISO Abbreviation:  J Ment Defic Res     Publication Date:  1976 Mar 
Date Detail:
Created Date:  1976-08-02     Completed Date:  1976-08-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375401     Medline TA:  J Ment Defic Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  25-30     Citation Subset:  IM    
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MeSH Terms
Conditioning, Operant
Extinction, Psychological*
Inhibition (Psychology)
Mental Retardation / diagnosis*
Reinforcement Schedule*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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