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J Exp Anal Behav. Jul 1962; 5(3): 369–374.
PMCID: PMC1404086

The effect of multiple SΔ periods on responding on a fixed-interval schedule1


The effect of repeated interruption of FI responding by short SΔ presentations on the pattern of increasing frequency of responding through the interval has been studied. Although the SΔ profoundly changed the pattern of responding during their presentation, the general scalloped pattern of FI responding survived. The implication of these findings for understanding the role of chaining of responses in FI patterns is discussed. It is suggested that chaining is not a necessary condition for the scalloped pattern.

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Selected References

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  • DEWS PB. Free-operant behavior under conditions of delayed reinforcement. I. CRF-type schedules. J Exp Anal Behav. 1960 Jul;3:221–234. [PMC free article] [PubMed]
  • REYNOLDS GS. Behavioral contrast. J Exp Anal Behav. 1961 Jan;4:57–71. [PMC free article] [PubMed]

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