Document Detail


Responding for sucrose and wheel-running reinforcement: effects of sucrose concentration and wheel-running reinforcer duration.
MedLine Citation:
PMID:  12822690     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Six male albino rats were placed in running wheels and exposed to a fixed-interval 30-s schedule of lever pressing that produced either a drop of sucrose solution or the opportunity to run for a fixed duration as reinforcers. Each reinforcer type was signaled by a different stimulus. In Experiment 1, the duration of running was held constant at 15 s while the concentration of sucrose solution was varied across values of 0, 2.5. 5, 10, and 15%. As concentration decreased, postreinforcement pause duration increased and local rates decreased in the presence of the stimulus signaling sucrose. Consequently, the difference between responding in the presence of stimuli signaling wheel-running and sucrose reinforcers diminished, and at 2.5%, response functions for the two reinforcers were similar. In Experiment 2, the concentration of sucrose solution was held constant at 15% while the duration of the opportunity to run was first varied across values of 15, 45, and 90 s then subsequently across values of 5, 10, and 15 s. As run duration increased, postreinforcement pause duration in the presence of the wheel-running stimulus increased and local rates increased then decreased. In summary, inhibitory aftereffects of previous reinforcers occurred when both sucrose concentration and run duration varied; changes in responding were attributable to changes in the excitatory value of the stimuli signaling the two reinforcers.
Authors:
Terry W Belke; Stephanie D Hancock
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  79     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2003-06-25     Completed Date:  2003-11-04     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:  243-65     Citation Subset:  IM    
Affiliation:
Department of Psychology, Mount Allison University, Sackville, New Brunswick, Canada. tbelke@mta.ca
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MeSH Terms
Descriptor/Qualifier:
Animals
Inhibition (Psychology)
Male
Rats
Rats, Wistar
Reinforcement (Psychology)*
Running*
Sucrose / administration & dosage*
Time Factors
Chemical
Reg. No./Substance:
57-50-1/Sucrose
Comments/Corrections

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