| Responding for sucrose and wheel-running reinforcement: effects of sucrose concentration and wheel-running reinforcer duration. | |
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MedLine Citation:
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PMID: 12822690 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Terry W Belke; Stephanie D Hancock |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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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:
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Created Date: 2003-06-25 Completed Date: 2003-11-04 Revised Date: 2010-09-14 |
Medline Journal Info:
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Nlm Unique ID: 0203727 Medline TA: J Exp Anal Behav Country: United States |
Other Details:
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Languages: eng Pagination: 243-65 Citation Subset: IM |
Affiliation:
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Department of Psychology, Mount Allison University, Sackville, New Brunswick, Canada. tbelke@mta.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Inhibition (Psychology) Male Rats Rats, Wistar Reinforcement (Psychology)* Running* Sucrose / administration & dosage* Time Factors |
| Chemical | |
Reg. No./Substance:
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57-50-1/Sucrose |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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