| Conjunctive schedules of reinforcement. I. Rate-dependent effects of pentobarbital and d-amphetamine. | |
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MedLine Citation:
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PMID: 4436616 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Key pecking of pigeons was maintained under conjunctive schedules of food presentation in which both a fixed-interval and a fixed-ratio schedule had to be completed before a peck produced food. For two pigeons, pecks on a single key completed both schedule requirements (fixed-interval 3-min, fixed-ratio 50 for one bird, fixed-interval 5-min, fixed-ratio 50 for the second). For two other pigeons, each requirement was scheduled on a separate key. On the two-key schedule, a peck after 5 min on the key scheduling the fixed-interval requirement produced food if at least 10 pecks had occurred on the ratio key (conjunctive fixed-interval 5-min, fixed-ratio 10). When each requirement was scheduled on a separate key, response rates on the fixed-ratio key were generally higher in the early portion of the interval and declined as the interval progressed; responding on the fixed-interval key, once initiated, typically remained at a constant rate throughout the interval. Responding under the single-key schedule was characterized by a high rate early in the interval; this then changed to a lower rate that continued until a peck produced food. For all pigeons, increases in response rates with pentobarbital and d-amphetamine were inversely related to the control rate of responding. When equivalent rates on each key of the two-key schedule were compared, both drugs increased rates on the fixed-ratio key less. Although the effects of both drugs were rate dependent, each drug differentially modified the pattern of responding under the single-key schedule. |
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Authors:
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J E Barrett |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the experimental analysis of behavior Volume: 22 ISSN: 0022-5002 ISO Abbreviation: J Exp Anal Behav Publication Date: 1974 Nov |
Date Detail:
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Created Date: 1975-03-10 Completed Date: 1975-03-10 Revised Date: 2010-09-10 |
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: 561-73 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Columbidae Conditioning, Operant / drug effects* Depression, Chemical Dextroamphetamine / administration & dosage, pharmacology* Dose-Response Relationship, Drug Injections, Intramuscular Male Pentobarbital / administration & dosage, pharmacology* Reaction Time Reinforcement Schedule* Stimulation, Chemical |
| Chemical | |
Reg. No./Substance:
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51-64-9/Dextroamphetamine; 76-74-4/Pentobarbital |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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