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Related Experiment Videos

Choice: Some quantitative relations.

E Fantino, M Davison

    Journal of the Experimental Analysis of Behavior
    |July 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    This study refined the delay-reduction hypothesis for pigeon behavior in concurrent-chains procedures. A modified equation, using square roots of reinforcement rates, better predicted choices when initial links were unequal.

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    Area of Science:

    • Behavioral Psychology
    • Animal Cognition
    • Operant Conditioning

    Background:

    • The delay-reduction hypothesis explains choice behavior based on reinforcement delays.
    • Concurrent-chains procedures involve initial and terminal links, influencing decision-making.
    • Previous models showed limitations when initial link values were unequal.

    Purpose of the Study:

    • To test the predictive accuracy of the delay-reduction hypothesis under various concurrent-chains conditions.
    • To develop a modified equation that better accounts for choice behavior, especially with unequal initial links.
    • To compare the modified model with existing behavioral economic models.

    Main Methods:

    • Six pigeons were trained on a concurrent-chains procedure with 56 distinct conditions.

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  • Conditions systematically varied the equality/inequality of delays in initial and terminal links.
  • Data were analyzed by comparing observed choices against predictions from different theoretical models.

    • Main Results:

    • The standard delay-reduction hypothesis fit well only when initial links were equal (mean deviation = .04).
    • The hypothesis performed poorly with unequal initial links (mean deviation = .18).
    • A modified equation, incorporating the square root of reinforcement rates, significantly improved fit across all conditions.

    Conclusions:

    • The modified delay-reduction hypothesis offers a more robust explanation for choice behavior in concurrent-chains procedures.
    • This revised model aligns with prior concurrent-chains research and Herrnstein's hyperbola for response rates.
    • The findings highlight the importance of considering reinforcement rate modifications for accurate behavioral prediction.