Document Detail

Ontogenetic adaptation and learning: a developmental constraint in learning for a thermal reinforcer.
MedLine Citation:
PMID:  10086226     Owner:  NLM     Status:  MEDLINE    
Hoffman, Flory, and Alberts (1999) demonstrated that 1-, 5-, and 11-day-old rats in a cool environment (25 degrees C) acquired an operant head-turning response when rewarded with a 20-s warming of the platform on which they lay. In the current experiment 5- and 11-day-old rats in a hot environment (40 degrees C) acquired the head-turning response when rewarded with a 20-s cooling of the platform on which they lay, but 1-day-olds did not. The concept of ontogenetic adaptation helps us interpret these results: Neonatal thermotaxis constrains the 1-day-olds from learning a novel operant response for a cool reinforcer in a hot environment. Because the thermotaxis wanes from birth, it is not as strong in 5- and 11-day-old pups that are thus able to learn the operant for a cool reinforcer.
C M Hoffman; G S Flory; J R Alberts
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Developmental psychobiology     Volume:  34     ISSN:  0012-1630     ISO Abbreviation:  Dev Psychobiol     Publication Date:  1999 Mar 
Date Detail:
Created Date:  1999-06-22     Completed Date:  1999-06-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0164074     Medline TA:  Dev Psychobiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  73-86     Citation Subset:  IM    
Department of Psychology, Indiana University, Bloomington 47405, USA.
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MeSH Terms
Adaptation, Physiological / physiology*
Animals, Newborn
Behavior, Animal / physiology
Body Temperature Regulation / physiology*
Conditioning, Operant*
Learning / physiology*
Rats, Sprague-Dawley
Reinforcement (Psychology)*
Time Factors
Grant Support

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

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