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. 1964 Mar;7(2):179–182. doi: 10.1901/jeab.1964.7-179

Aperiodicity as a factor in choice¹

PMCID: PMC1404317 PMID: 14130099

Abstract

Four pigeons were trained to peck at either of two response-keys. Pecks at either key occasionally produced a secondary reinforcer, in the presence of which further pecks occasionally produced food, the primary reinforcer. All pigeons showed a consistent preference for variable (as compared to fixed) interval schedules of primary reinforcement.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

HERRNSTEIN R. J. SECONDARY REINFORCEMENT AND RATE OF PRIMARY REINFORCEMENT. J Exp Anal Behav. 1964 Jan;7:27–36. doi: 10.1901/jeab.1964.7-27. [DOI] [PMC free article] [PubMed] [Google Scholar]
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