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Related Experiment Videos

Choice and transformed interreinforcement intervals.

J Moore

    Journal of the Experimental Analysis of Behavior
    |September 1, 1984
    PubMed
    Summary
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    Pigeons showed different preferences between reinforcement schedules based on how choices were measured. Findings suggest aggregate schedule properties may not predict behavior accurately.

    Area of Science:

    • Behavioral neuroscience
    • Animal behavior
    • Operant conditioning

    Background:

    • Reinforcement schedules are fundamental to operant conditioning.
    • Aperiodic schedules present variable intervals between reinforcements.
    • Aggregate properties like arithmetic and harmonic means are used to describe schedules.

    Purpose of the Study:

    • To investigate pigeon choice behavior between two aperiodic, time-based schedules of reinforcement.
    • To determine if pigeons prefer schedules with shorter arithmetic or harmonic mean interreinforcement intervals.
    • To examine how terminal link duration in concurrent-chains procedures affects schedule preference.

    Main Methods:

    • Pigeons were presented with choices between two schedules with contrasting arithmetic and harmonic means.

    Related Experiment Videos

  • Concurrent-chains procedures were used, with terminal links ending either after the first reinforcer or a fixed duration.
  • Two-key concurrent variable-interval and concurrent variable-time procedures were also employed.

    • Main Results:

    • Pigeons preferred the schedule with the shorter harmonic mean when terminal links ended after the first reinforcer.
    • Preference reversed to the shorter arithmetic mean when terminal links ended after a fixed duration.
    • In other procedures, pigeons consistently preferred the schedule with the shorter arithmetic mean.

    Conclusions:

    • Pigeon choice behavior is sensitive to the specific measurement of schedule properties and experimental procedure.
    • Aggregate schedule properties, such as mean interreinforcement intervals, may not reliably predict choice behavior.
    • The findings highlight the complexity of reinforcement schedule valuation in decision-making.