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Journal of the Experimental Analysis of Behavior logoLink to Journal of the Experimental Analysis of Behavior
. 1983 May;39(3):465–478. doi: 10.1901/jeab.1983.39-465

Temporal control in a complex environment: An analysis of schedule-related behavior

Kenneth McIntire, Duane Lundervold, Helen Calmes, Connie Jones, Susan Allard
PMCID: PMC1347857  PMID: 16812331

Abstract

Three experiments conducted in an automated ten-compartment chamber recorded collateral activities of rats reinforced for lever pressing on differential-reinforcement-of-low-rate schedules. In Experiment 1, the rate of lever pressing increased when stimulus support for collateral activities was removed, thus confirming earlier findings. However, there were no temporal or sequential patterns of collateral activities that predicted operant responding. In Experiment 2, the rate of lever pressing increased only if (a) access to all stimulus support for collateral activities was simultaneously prevented, and (b) the rat was forced to remain in the presence of the lever and food tray. The availability of any of the stimuli related to collateral activity was sufficient to keep lever-pressing rates from increasing. Experiment 3 examined collateral activities under a signaled differential-reinforcement-of-low-rate schedule. Preventing access to stimuli supporting collateral activities had little effect on stable lever pressing when the signal was maintained. When the signal was removed, collateral activities continued, but lever-pressing rates increased in three of the four rats and rates of food presentation declined in all rats. Hypotheses that collateral activities have (a) a timekeeping or discriminative function, or (b) directly inhibit operant responding were not supported. The results suggest that collateral activities may facilitate operant responding by simply removing the subject from the presence of reinforcement-related stimuli.

Keywords: DRL, fixed-time, collateral, lever press, competition, concurrent, rats

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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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