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Performance in concurrent interval schedules.

A J Trevett, M C Davison, R J Williams

    Journal of the Experimental Analysis of Behavior
    |May 1, 1972
    PubMed
    Summary
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    Pigeons consistently preferred variable-interval schedules over fixed-interval schedules, regardless of reinforcement rates. This behavior supports existing theories on fixed-interval schedule performance in animal studies.

    Area of Science:

    • Behavioral psychology
    • Animal behavior
    • Operant conditioning

    Background:

    • Understanding how animals allocate responses and time under different reinforcement schedules is crucial in behavioral psychology.
    • Previous research, including Schneider's (1969) analysis, has explored performance on fixed-interval schedules.

    Purpose of the Study:

    • To investigate pigeon behavior under concurrent variable-interval (VI) and fixed-interval (FI) schedules.
    • To measure response and time allocation across different reinforcement rates on each schedule.
    • To evaluate the consistency of preference between VI and FI schedules.

    Main Methods:

    • Four pigeons were trained in a two-key operant chamber.
    • Concurrent variable-interval variable-interval and fixed-interval variable-interval schedules were employed.

    Related Experiment Videos

  • Response and time allocation were recorded under varying reinforcement rates for each schedule.

    • Main Results:

    • All pigeons demonstrated a consistent proportional preference for the variable-interval schedule.
    • This preference remained stable irrespective of the reinforcement rates presented on either key.
    • The findings indicate a predictable pattern in how pigeons choose between VI and FI schedules.

    Conclusions:

    • The observed constant preference for variable-interval schedules supports Schneider's (1969) theoretical analysis of fixed-interval schedule performance.
    • Pigeon behavior in this concurrent schedule paradigm highlights the robustness of preference for variable reinforcement.
    • This study contributes to the understanding of choice behavior and reinforcement principles in animal learning.