Abstract
Pigeons pecked a key under two-component multiple variable-ratio schedules that offered 8-s or 2-s access to grain. Postreinforcement pausing and the rates of responding following the pause (run rates) in each component were measured as a function of variable-ratio size and the size of the lowest ratio in the configuration of ratios comprising each schedule. In one group of subjects, variable-ratio size was varied while the size of the lowest ratio was held constant. In a second group, the size of the lowest ratio was varied while variable-ratio size was held constant. For all subjects, the mean duration of postreinforcement pausing increased in the 2-s component but not in the 8-s component. Postreinforcement pauses increased with increases in variable-ratio size (Group 1) and with increases in the lowest ratio (Group 2). In both groups, run rates were slightly higher in the 8-s component than in the 2-s component. Run rates decreased slightly as variable-ratio size increased, but were unaffected by increases in the size of the lowest ratio. These results suggest that variable-ratio size, the size of the lowest ratio, and reinforcer magnitude interact to determine the duration of postreinforcement pauses.
Keywords: postreinforcement pause, variable-ratio schedule, lowest ratio, reinforcer magnitude, run rate, key peck, pigeons
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Selected References
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- Blakely E., Schlinger H. Determinants of pausing under variable-ratio schedules: Reinforcer magnitude, ratio size, and schedule configuration. J Exp Anal Behav. 1988 Jul;50(1):65–73. doi: 10.1901/jeab.1988.50-65. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Crossman E. K., Bonem E. J., Phelps B. J. A comparison of response patterns on fixed-, variable-, and random-ratio schedules. J Exp Anal Behav. 1987 Nov;48(3):395–406. doi: 10.1901/jeab.1987.48-395. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Felton M., Lyon D. O. The post-reinforcement pause. J Exp Anal Behav. 1966 Mar;9(2):131–134. doi: 10.1901/jeab.1966.9-131. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mazur J. E. Steady-state performance on fixed-, mixed-, and random-ratio schedules. J Exp Anal Behav. 1983 Mar;39(2):293–307. doi: 10.1901/jeab.1983.39-293. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Powell R. W. The effect of reinforcement magnitude upon responding under fixed-ratio schedules. J Exp Anal Behav. 1969 Jul;12(4):605–608. doi: 10.1901/jeab.1969.12-605. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Priddle-Higson P. J., Lowe C. F., Harzem P. Aftereffects of reinforcement on variable-ratio schedules. J Exp Anal Behav. 1976 May;25(3):347–354. doi: 10.1901/jeab.1976.25-347. [DOI] [PMC free article] [PubMed] [Google Scholar]
- SIDMAN M., STEBBINS W. C. Satiation effects under fixed-ratio schedules of reinforcement. J Comp Physiol Psychol. 1954 Apr;47(2):114–116. doi: 10.1037/h0054127. [DOI] [PubMed] [Google Scholar]