Abstract
Keypecking of pigeons was studied under differential-reinforcement-of-low-rate (DRL) and variable-interval (VI) schedules in which the interreinforcement times on the two schedules were equated by a yoking procedure. Each schedule was available for half of every session and a change of schedule was signaled by a change of key color. The value of the DRL schedule was varied from .5 to 300 sec. Response rates were always higher in the VI schedule, but within sessions there was a sharp change in response rate coincident with the change in schedule only under lower schedule values. A group without prior training was tested with a 180-sec schedule value, and it, too, developed a higher response rate during the VI schedule, showing that the effect was not dependent on prior experience under low schedule values. In all conditions except the .5- and 1-sec values of the schedule, the mean proportion of responses emitted during the VI schedule was approximately .85 of the responses emitted during both schedules. The conclusion was that the requirement of a minimum interresponse time for reinforcement may work its effect by determining which responses may occur just prior to the reinforced response and thus receive delayed reinforcement.
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The data of Experiment 11 were collected by Larry G. Holder and were submitted to the Psychology Department in partial fulfillment of the requirements for graduating with honors in psychology.
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Richardson, W.K. The sensitivity of the pigeon’s keypeck to the differential reinforcement of long interresponse times. Animal Learning & Behavior 4, 231–240 (1976). https://doi.org/10.3758/BF03214042
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DOI: https://doi.org/10.3758/BF03214042