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Behavioral interactions and stimulus control during conditional discriminations.

D M Wilkie

    Journal of the Experimental Analysis of Behavior
    |November 1, 1973
    PubMed
    Summary
    This summary is machine-generated.

    Pigeons learned conditional discriminations where houselight flashes changed reinforcement for line tilt. Behavioral contrast was observed, and both stimuli controlled behavior only when linked.

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    Area of Science:

    • Behavioral Psychology
    • Animal Cognition
    • Operant Conditioning

    Background:

    • Understanding how animals learn complex associations is crucial in behavioral psychology.
    • Conditional discriminations involve learning stimulus-dependent rules for reinforcement.

    Purpose of the Study:

    • To investigate how pigeons learn conditional discriminations involving visual stimuli (line tilt) and light patterns (houselight frequency).
    • To examine the role of behavioral contrast during the acquisition and extinction of these discriminations.
    • To assess stimulus control by line tilt and houselight frequency under different conditional rules.

    Main Methods:

    • Two pigeons were exposed to a variable-interval schedule of reinforcement for key pecking.
    • Conditional discrimination training was implemented, linking reinforcement availability for line tilt to houselight frequency.
    • Generalization tests were conducted to evaluate stimulus control.

    Main Results:

    • Pigeons successfully acquired all conditional discriminations.
    • Behavioral contrast was evident during both the acquisition and abolition phases of the discriminations.
    • Stimulus control by both line tilt and houselight frequency was observed only when reinforcement depended on both dimensions.

    Conclusions:

    • Pigeons can learn complex conditional discriminations where multiple stimuli signal reinforcement contingencies.
    • Behavioral contrast is a robust phenomenon during the formation and dissolution of these learned associations.
    • Effective stimulus control requires the integration of information from both conditional dimensions.