Document Detail


The effect of signaled reinforcement on rats' fixed-interval responding.
MedLine Citation:
PMID:  12908763     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Four experiments examined the effect on rats' response rate of presenting a brief (500 ms) stimulus simultaneously with the delivery of food on fixed-interval (FI) schedules. In Experiment 1, reinforcement signals that were spatially diffuse (both tones and lights) elevated rates of responding, but responding was attenuated by localized visual stimuli. The remaining experiments examined the signal-induced potentiation of responding. In Experiment 2, a tone reinforcement signal potentiated response rates on an FI schedule, but attenuated response rates on a variable-interval (VI) schedule. This difference was obtained even though the overall rate of responding was equated on the two schedules before the introduction of the signal. Signal-induced potentiation of responding occurred over a range of FI values employed in Experiment 3. In Experiment 4, presenting a reinforcement signal when high local rates of response had occurred immediately before reinforcement resulted in potentiated rates of responding on an FI schedule. The opposite effect on response rate occurred when the reinforcement signal followed only low local rates of response. These results indicate that a variety of factors influence the effects of a reinforcement signal. They imply, however, that the local rate of response at the time of reinforcement is a key factor in establishing the nature of the signaling effect.
Authors:
Phil Reed
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  79     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2003 May 
Date Detail:
Created Date:  2003-08-11     Completed Date:  2003-12-09     Revised Date:  2010-09-14    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  367-82     Citation Subset:  IM    
Affiliation:
Department of Psychology, University College London, United Kingdom. p.reed@ucl.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Animals
Conditioning, Operant
Feeding Behavior
Male
Rats
Reinforcement Schedule*
Signal Detection, Psychological
Visual Perception
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