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Related Experiment Videos

A model for choice in simple concurrent and concurrent-chains schedules.

N Squires, E Fantino

    Journal of the Experimental Analysis of Behavior
    |January 1, 1971
    PubMed
    Summary
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    Pigeons preferred options with shorter average reinforcement times. Response rates adjusted based on reinforcement differences and recent rewards, challenging existing choice behavior models.

    Area of Science:

    • Behavioral science
    • Animal behavior studies
    • Operant conditioning

    Background:

    • The concurrent-chains procedure models choice behavior.
    • Previous models struggled to explain pigeons' choices under specific reinforcement schedules.

    Purpose of the Study:

    • To investigate pigeons' choice behavior when presented with two initial-link stimuli leading to different terminal-link stimuli.
    • To identify factors influencing response allocation in concurrent-chains procedures.
    • To propose a modified model for choice behavior.

    Main Methods:

    • Pigeons were trained using concurrent-chains procedures.
    • Initial-link stimuli led to terminal-link stimuli under independent variable-interval schedules.
    • Reinforcement was delivered based on terminal-link schedule performance.

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    Main Results:

    • Pigeons allocated more responses to the initial-link associated with a shorter average interreinforcement interval.
    • Response allocation differences correlated with the magnitude of interval differences.
    • Consecutive reinforcements in the terminal link reduced initial-link response differences.

    Conclusions:

    • Existing choice behavior models are insufficient for concurrent-chains procedures.
    • A modified model incorporating a multiplier for overall reinforcement rate better predicts choice behavior.
    • The proposed model also applies to simpler concurrent choice situations.