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Related Experiment Videos

Errorless discrimination established by differential autoshaping.

D M Wilkie, D G Ramer

    Journal of the Experimental Analysis of Behavior
    |September 1, 1974
    PubMed
    Summary
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    Pigeons learned to peck keys when a stimulus signaled food (differential autoshaping). Stimuli previously signaling no food, but later paired with it, showed inhibitory properties, impacting discrimination learning.

    Area of Science:

    • Behavioral Psychology
    • Animal Cognition
    • Learning and Conditioning

    Background:

    • Autoshaping procedures involve associating stimuli with reinforcement.
    • Differential autoshaping involves stimuli associated with both reinforcement and nonreinforcement.
    • Understanding inhibitory stimuli is crucial for discrimination learning.

    Purpose of the Study:

    • To investigate the inhibitory properties of stimuli previously associated with nonreinforcement in pigeons.
    • To explore the implications of these findings for autoshaping and discrimination theories.

    Main Methods:

    • Experiment I: Pigeons underwent differential autoshaping with stimuli predicting reinforcement or nonreinforcement.
    • Experiment II: Pigeons were exposed to stimuli predicting nonreinforcement, then later paired with reinforcement.

    Related Experiment Videos

  • Response rates (key pecking) were measured in the presence of different stimuli.

    • Main Results:

    • Pigeons pecked in the presence of reinforcement-predicting stimuli but not nonreinforcement-predicting stimuli.
    • Pigeons initially responded to one nonreinforcement stimulus but not a second, suggesting differential inhibition.
    • Establishing responses to the previously nonreinforced stimulus required significant reinforcement pairings, indicating inhibition.

    Conclusions:

    • Stimuli associated with nonreinforcement can acquire inhibitory properties in autoshaping.
    • These inhibitory stimuli require substantial conditioning to overcome, supporting their role in discrimination.
    • Findings contribute to understanding discrimination byproducts and errorless discrimination learning.