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Related Experiment Videos

Controls for and constraints on auto-shaping.

J Bilbrey, S Winokur

    Journal of the Experimental Analysis of Behavior
    |November 1, 1973
    PubMed
    Summary

    Auto-shaping in pigeons requires regular pairing of a keylight with food. Independent presentations of light and food, even on reduced schedules, do not reliably condition key-pecking behavior.

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    Area of Science:

    • Behavioral Psychology
    • Animal Cognition
    • Learning and Conditioning

    Background:

    • Respondent conditioning is a fundamental learning process.
    • Auto-shaping investigates how stimuli become associated with rewards.
    • Pigeon models are widely used to study associative learning.

    Purpose of the Study:

    • To examine auto-shaping of pigeon key-peck response using Rescorla's truly-random control procedure.
    • To determine the necessary conditions for auto-shaping to occur.
    • To differentiate between respondent conditioning and incidental stimulus-food pairings.

    Main Methods:

    • Pigeons were exposed to various schedules of keylight and food presentation.
    • Experiments employed truly-random, explicitly paired, and explicitly unpaired procedures.
    • Control conditions included varied inter-stimulus intervals and different sensory modalities (tone).

    Main Results:

    • Pigeons failed to develop key-pecking under truly-random or explicitly unpaired conditions.
    • Explicit pairing of keylight and food rapidly conditioned the key-peck response.
    • Reduced variable-time schedules of independent presentations were largely ineffective in inducing auto-shaping.

    Conclusions:

    • Auto-shaping of the pigeon key-peck response is contingent upon regular, explicit pairing of the keylight with food.
    • Incidental or independent presentations of stimuli do not reliably establish conditioned responses.
    • The findings underscore the importance of contingency in associative learning.

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