期刊
BEHAVIOURAL PROCESSES
卷 78, 期 2, 页码 246-252出版社
ELSEVIER
DOI: 10.1016/j.beproc.2008.02.001
关键词
progressive ratio schedules; food; saccharin; step size; rats
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. (c) 2008 Elsevier B.V. All rights reserved.
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