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| Research article summary (published 6 Feb 2008): |
Effects of reinforcer quality and step size on rats' performance under progressive ratio schedules.
Full Abstract
The Mathematical Principles of Reinforcement (MPR) model accurately predicts performance in fixed ratio (FR) schedules of reinforcement. The aim of the present study was to assess the generality of MPR with rats responding under progressive ratio (PR) schedules of different step sizes (PR1 or PR3) that provided either food or saccharin pellets. The results showed that the rats responding for saccharin pellets produced higher breakpoints (i.e., completed higher ratios) than those responding for food pellets. In terms of theoretical parameters, one finding unanticipated on the basis of MPR was that the a parameter (specific activation) was higher for the PR3 schedules. This finding suggests that specific activation may be affected indirectly by motor parameters of the task.
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Author information
Author/s: Covarrubias, Pablo (P); Aparicio, Carlos F (CF);
Affiliation: Universidad de Guadalajara-CUCBA-Instituto de Neurociencias, Francisco de Quevedo 180, Arcos Vallarta 44130, Guadalajara, Mexico. cscpablo(-atsign-)hotmail.com
Journal and publication information
Publication Type: Journal Article
Journal: Behavioural processes (Behav Processes), published in Netherlands. (Language: eng)
Reference: 2008-Jun; vol 78 (issue 2) : pp 246-52
Dates: Created 2008/04/28; Completed 2008/07/25;
PMID: 18346855, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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