| Species differences between rats and pigeons in choices with probabilistic and delayed reinforcers. | |
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MedLine Citation:
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PMID: 17343994 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An adjusting-delay procedure was used to study rats' choices with probabilistic and delayed reinforcers, and to compare them with previous results from pigeons. A left lever press led to a 5-s delay signaled by a light and a tone, followed by a food pellet on 50% of the trials. A right lever press led to an adjusting delay signaled by a light followed by a food pellet on 100% of the trials. In some conditions, the light and tone for the probabilistic reinforcer were present only on trials that delivered food. In other conditions, the light and tone were present on all trials that the left lever was chosen. Similar studies with pigeons [Mazur, J.E., 1989. Theories of probabilistic reinforcement. J. Exp. Anal. Behav. 51, 87-99; Mazur, J.E., 1991. Conditioned reinforcement and choice with delayed and uncertain primary reinforcers. J. Exp. Anal. Behav. 63, 139-150] found that choice of the probabilistic reinforcer increased dramatically when the delay-interval stimuli were omitted on no-food trials, but this study found no such effect with the rats. In other conditions, the probability of food was varied, and comparisons to previous studies with pigeons indicated that rats showed greater sensitivity to decreasing reinforcer probabilities. The results support the hypothesis that rats' choices in these situations depend on the total time between a choice response and a reinforcer, whereas pigeons' choices are strongly influenced by the presence of delay-interval stimuli. |
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Authors:
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James E Mazur |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural Date: 2007-02-08 |
Journal Detail:
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Title: Behavioural processes Volume: 75 ISSN: 0376-6357 ISO Abbreviation: Behav. Processes Publication Date: 2007 Jun |
Date Detail:
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Created Date: 2007-04-24 Completed Date: 2007-07-06 Revised Date: 2007-12-03 |
Medline Journal Info:
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Nlm Unique ID: 7703854 Medline TA: Behav Processes Country: Netherlands |
Other Details:
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Languages: eng Pagination: 220-4 Citation Subset: IM |
Affiliation:
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Psychology Department, Southern Connecticut State University, New Haven, CT 06515, USA. mazurj1@southernct.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Association Learning / physiology* Choice Behavior / physiology* Columbidae Probability Learning* Rats Rats, Sprague-Dawley Reinforcement (Psychology)* Species Specificity Time Factors Time Perception / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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MH 38357/MH/NIMH NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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