Document Detail

Within-session changes in responding during concurrent schedules with different reinforcers in the components.
MedLine Citation:
PMID:  8921615     Owner:  NLM     Status:  MEDLINE    
Rats and pigeons responded on several concurrent schedules that provided different reinforcers in the two components (food and water for rats, Experiment 1; wheat and mixed grain for pigeons, Experiment 2). The rate of responding and the time spent responding on each component usually changed within the session. The within-session changes in response rates and time spent responding usually followed different patterns for the two components of a concurrent schedule. For most subjects, the bias and sensitivity to reinforcement parameters of the generalized matching law, as well as the percentage of the variance accounted for, decreased within the session. Negative sensitivity parameters were sometimes found late in the session for the concurrent food-water schedules. These results imply that within-session changes in responding could cause problems for assessing the validity of quantitative theories of concurrent-schedule responding when the components provide different reinforcers. They question changes in a general motivational state, such as arousal, as a complete explanation for within-session changes in responding. The results are compatible with satiation for, or sensitization-habituation to, the reinforcers as explanations.
F K McSweeney; S Swindell; J N Weatherly
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  66     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  1996 Nov 
Date Detail:
Created Date:  1996-12-24     Completed Date:  1996-12-24     Revised Date:  2010-09-13    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  369-90     Citation Subset:  IM    
Department of Psychology, Washington State University, Pullman 99164-4820, USA.
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MeSH Terms
Behavior, Animal
Rats, Sprague-Dawley
Reinforcement Schedule*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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