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Related Experiment Videos

Matching and maximizing with concurrent ratio-interval schedules.

L Green, H Rachlin, J Hanson

    Journal of the Experimental Analysis of Behavior
    |November 1, 1983
    PubMed
    Summary
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    Animal behavior studies show that animals can maximize reinforcement rates by favoring variable-ratio schedules. This experiment, by reducing leisure, found the predicted bias, supporting maximization theory in animal choice behavior.

    Area of Science:

    • Behavioral neuroscience
    • Animal behavior and cognition
    • Operant conditioning

    Background:

    • Standard concurrent schedules often fail to show response bias toward variable-ratio schedules.
    • This has been cited as evidence against maximization theory in animal choice behavior.
    • Previous experiments were confounded by the value of leisure, impacting reinforcement.

    Purpose of the Study:

    • To re-evaluate maximization theory in animal choice behavior.
    • To test for response bias under concurrent schedules with minimized leisure.
    • To investigate the role of concurrent variable-ratio and variable-interval schedules.

    Main Methods:

    • Utilized a concurrent procedure with modified variable-ratio and variable-interval schedules.
    • Designed the procedure to largely eliminate the confounding effects of leisure.

    Related Experiment Videos

  • Responded in one component advanced only its ratio schedule; the other advanced both.

    • Main Results:

    • A significant response bias toward the component advancing both schedules was observed.
    • This bias aligns with predictions from maximization theory.
    • The results contrast with findings from standard concurrent schedules.

    Conclusions:

    • The study provides evidence supporting maximization theory in animal choice behavior.
    • Minimizing leisure in experimental design is crucial for accurate behavioral analysis.
    • Concurrent schedules can elicit predicted biases when confounding factors are controlled.