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Preference for unsegmented interreinforcement intervals in concurrent chains.

J P Leung, A S Winton

    Journal of the Experimental Analysis of Behavior
    |July 1, 1985
    PubMed
    Summary
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    Pigeons showed a preference for simple or tandem schedules over chained schedules. This preference was stronger for fixed-interval schedules and when a changeover delay was present.

    Area of Science:

    • Behavioral psychology
    • Animal behavior research
    • Operant conditioning

    Background:

    • Concurrent-chain schedules are used to study choice behavior in animals.
    • Understanding schedule preferences provides insights into reinforcement mechanisms.

    Purpose of the Study:

    • To investigate pigeon preferences between chained and non-chained schedules.
    • To examine the effects of schedule type, interval length, and changeover delay on preference.

    Main Methods:

    • Pigeons were trained on concurrent-chain schedules with varying terminal-link schedules (chained, simple, tandem).
    • Independent, concurrent variable-interval schedules were used in the initial link.
    • Fixed-interval and variable-interval schedules were manipulated in the terminal link, with and without a changeover delay.

    Related Experiment Videos

    Main Results:

    • Pigeons consistently preferred simple or tandem schedules over chained schedules.
    • Preference for non-chained schedules increased with longer fixed intervals (60s vs 15s).
    • A changeover delay enhanced preference, particularly with variable-interval schedules and shorter fixed intervals.

    Conclusions:

    • Segmenting the interreinforcement interval into a chain reduces preference.
    • Schedule structure significantly influences choice behavior in pigeons.
    • Changeover delays can modulate preference by altering the perceived cost of switching.