Document Detail

The effect of reinforcer delays on the form of the forgetting function.
MedLine Citation:
PMID:  13677610     Owner:  NLM     Status:  MEDLINE    
Pigeons were trained in a matching-to-sample procedure with retention intervals of 0, 2, 4, 6, and 8 s mixed within each session. In different conditions, reinforcement was delayed by 0, 1, 2, 4, 6, or 8 s from correct choice responses. Discriminability decreased with increasing retention-interval duration and with increasing reinforcer delay. Exponential forgetting functions were fitted to discriminability measures plotted as a function of retention interval. Initial discriminability (intercept of the fitted functions) decreased with increasing reinforcer delay. Rate of forgetting (slope of the fitted functions) increased with reinforcer delay, suggesting an interaction between the effects of reinforcer delay and retention interval. The data were well described by multiplying an exponential function describing the effects of retention interval by a hyperbolic function describing the effect of reinforcer delay. This description included an interaction term that allowed for a greater effect of reinforcer delay at longer retention intervals.
Rebecca J Sargisson; K Geoffrey White
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  80     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-09-17     Completed Date:  2004-02-06     Revised Date:  2010-09-21    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  77-94     Citation Subset:  IM    
Department of Psychology, University of Otago, Dunedin, New Zealand.
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MeSH Terms
Behavior, Animal / physiology*
Reinforcement (Psychology)*
Retention (Psychology)*
Time Factors
Erratum In:
J Exp Anal Behav. 2004 Jul;82(1):20

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