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. 1981 Jul;36(1):41–49. doi: 10.1901/jeab.1981.36-41

Conditioned reinforcement as a function of duration of stimulus

James A Dinsmoor, Dallas E Mulvaney, Alice R Jwaideh
PMCID: PMC1333051  PMID: 16812230

Abstract

Pigeons were provided with three keys. Pecking the center key produced grain on a schedule that alternated at unpredictable times between a variable-interval component and extinction. On concurrent variable-interval schedules, pecking either side key produced a stimulus associated with the variable-interval component on the center key provided that said schedule was currently in effect. The independent variable was the length of time this stimulus remained on the keys. Pecking one side key produced the stimulus for 27 seconds, whereas the duration produced by pecking the other key varied for successive blocks of sessions. For the first four birds, the values tested were 3, 9, 27, and 81 seconds. For the second group, numbering three birds, the values tested were 1, 3, 9, and 27 seconds. The dependent variable was the proportion of total side key pecks that occurred on the variable key. For all birds, the function was positive in slope and negative in acceleration. This finding supports a formulation that ascribes the maintenance of observing responses in a normal setting to the fact that the subject exposes itself to the positive discriminative stimulus for a longer mean duration than it does to the negative stimulus.

Keywords: observing, duration of stimulus, conditioned reinforcer, concurrent schedule, key peck, pigeons

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Selected References

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

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