Document Detail

Neonatal thermotaxis improves reversal of a thermally reinforced operant response.
MedLine Citation:
PMID:  10086227     Owner:  NLM     Status:  MEDLINE    
One-, 5-, and 11-day-old rats in a cool environment (25 degrees C) acquired an operant response when rewarded with a 20-s-long warming of the platform (from 25 to 36 degrees C) on which they lay. In Experiment 1, the head-turning response was learned by pups at all ages. When the contingency was reversed so that pups were reinforced for turning to the side opposite that correct during training, the original response extinguished for 1-day-olds, but not for 5- or 11-day-olds. In Experiment 2, the rewarded side was randomly selected for each trial. One-day-olds perseverated in turning to the side correct on that trial while the reinforcer remained on, but 5- and 11-day-old rat pups did not. We conclude that 1-day-old pups were more responsive to the change in experimental contingency in Experiment 1 due to this thermotaxic behavior.
C M Hoffman; G S Flory; J R Alberts
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Publication Detail:
Type:  Comparative Study; Journal Article; 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:  87-99     Citation Subset:  IM    
Department of Psychology, Indiana University, Bloomington 47405, USA.
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MeSH Terms
Age Factors
Animals, Newborn
Behavior, Animal / physiology
Body Temperature Regulation / physiology*
Conditioning, Operant*
Rats, Sprague-Dawley
Reinforcement (Psychology)
Grant Support

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