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Related Experiment Video

Updated: Jul 12, 2026

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
07:34

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Published on: June 3, 2013

Choice, experience, and the generalized matching law.

J C Todorov, J M de Oliveira Castro, E S Hanna

    Journal of the Experimental Analysis of Behavior
    |September 1, 1983
    PubMed
    Summary

    This study on pigeon behavior found that the exponent in the generalized matching law decreases with more experimental conditions but increases with more sessions. Subject experience and training variations may explain inconsistent exponent values in matching law research.

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    Area of Science:

    • Behavioral science
    • Animal behavior studies
    • Operant conditioning research

    Background:

    • The generalized matching law is a fundamental principle in behavioral science, describing response allocation.
    • Understanding factors influencing the law's parameters, such as the exponent (a) and bias (k), is crucial for refining behavioral models.

    Purpose of the Study:

    • To investigate how the number of experimental conditions and sessions per condition affect the parameters of the generalized matching law in pigeons.
    • To explore potential explanations for variability in the generalized matching law's exponent values observed in the literature.

    Main Methods:

    • Five pigeons were subjected to concurrent variable-interval, variable-interval schedules across nine experimental conditions.
    • Parameters of the generalized matching equation were calculated across cumulative experimental conditions (5-9) and sessions per condition (30, then 55).

    Main Results:

    • The exponent (a) for both response and time distribution tended to decrease as the number of experimental conditions increased.
    • Conversely, the exponent (a) tended to increase with a greater number of sessions per condition.
    • Bias (k) values exhibited unsystematic variation, and findings were confirmed with extended sessions (55 per condition).

    Conclusions:

    • The number of experimental conditions and sessions significantly influences the exponent in the generalized matching law.
    • Variability in subject experience and training parameters across studies may contribute to inconsistencies in generalized matching law exponent values.
    • These findings refine our understanding of the generalized matching law and highlight the importance of experimental design in behavioral research.