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J Exp Anal Behav. 1967 Nov; 10(6): 517–527.
PMCID: PMC1338422

Changeover delay and concurrent schedules: some effects on relative performance measures1

Abstract

The pigeon and the rat partition total response output between both schedules of a concurrent variable-interval pair. The quantitative nature of a partition seems critically dependent on the relative rates with which the two schedules provide reinforcements for responding, in addition to the changeover delay. The manner in which the changeover delay controls the partition was studied by varying the duration of the changeover delay from 0 to 20 sec with each of two pairs of concurrent variable-interval schedules, viz., Conc VI 1.5-min VI 1.5-min and Conc VI 1-min VI 3-min. Rats served as the subjects and brain stimulation was employed as the reinforcer. When the schedules were Conc VI 1.5-min VI 1.5-min, relative response rate approximated 0.50 at all values of the changeover delay. When the schedules were Conc VI 1-min VI 3-min, relative response rate, computed with respect to the VI 1-min schedule, increased when the duration of the changeover delay increased. Changeover rate decreased when the duration of the changeover delay increased. The decrease was the same for both VI schedules of the Conc VI 1.5-min VI 1.5-min pair but was more rapid for the VI 3-min schedule of the Conc VI 1-min VI 3-min pair.

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Selected References

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  • CATANIA AC. Concurrent performances: reinforcement interaction and response independence. J Exp Anal Behav. 1963 Apr;6:253–263. [PMC free article] [PubMed]
  • Findley JD. Preference and Switching under Concurrent Scheduling. J Exp Anal Behav. 1958 Apr;1(2):123–144. [PMC free article] [PubMed]
  • HERRNSTEIN RJ. Relative and absolute strength of response as a function of frequency of reinforcement. J Exp Anal Behav. 1961 Jul;4:267–272. [PMC free article] [PubMed]
  • PLISKOFF SS, WRIGHT JE, HAWKINS TD. BRAIN STIMULATION AS A REINFORCER: INTERMITTENT SCHEDULES. J Exp Anal Behav. 1965 Mar;8:75–88. [PMC free article] [PubMed]

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