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Two-key concurrent paced variable-interval paced variable-interval schedules of reinforcement.

M Moffitt, C P Shimp

    Journal of the Experimental Analysis of Behavior
    |July 1, 1971
    PubMed
    Summary
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    Pigeons adjusted their responding based on reinforcement schedules. Response frequency on a key mirrored the inverse of the reinforced interresponse time, showing sensitivity to both frequency and magnitude of rewards.

    Area of Science:

    • Behavioral psychology
    • Operant conditioning
    • Animal behavior research

    Background:

    • Investigates reinforcement schedules and their impact on animal behavior.
    • Builds upon previous research into concurrent schedules of reinforcement.

    Purpose of the Study:

    • To examine how pigeons allocate responses under two-key concurrent variable-interval schedules.
    • To determine the influence of reinforced interresponse time (IRT) length, reinforcement frequency, and reinforcement magnitude on response allocation.

    Main Methods:

    • Nine pigeons were trained on a two-key concurrent paced variable-interval schedule.
    • Experiment I varied the lengths of the reinforced interresponse times on each key.
    • Experiment II manipulated the relative frequency and magnitude of reinforcement for each key.

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    Main Results:

    • Response frequency on a key was inversely proportional to the length of the reinforced interresponse time.
    • Response frequency increased monotonically and negatively accelerated with increased relative frequency of reinforcement.
    • Response magnitude influenced response frequency similarly to reinforcement frequency.

    Conclusions:

    • Pigeon response allocation is predictable under complex concurrent schedules.
    • Findings align with previous research on single-key schedules, suggesting generalizable principles of reinforcement.
    • Demonstrates pigeons' sensitivity to both the temporal and quantitative aspects of reinforcement.