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Related Experiment Videos

Choice between two-component chained and tandem schedules.

J W Schneider

    Journal of the Experimental Analysis of Behavior
    |July 1, 1972
    PubMed
    Summary

    Pigeon behavior on choice tasks shows initial key responses are driven by delayed primary reinforcement, not conditioned stimuli. This suggests a reinterpretation of reinforcement mechanisms in complex schedules.

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    Area of Science:

    • Behavioral Psychology
    • Animal Cognition
    • Operant Conditioning

    Background:

    • Complex schedules of reinforcement are crucial for understanding animal behavior and learning.
    • The role of conditioned reinforcement in maintaining behavior within chained and tandem schedules has been debated.
    • Previous research often attributed performance in such schedules to stimuli signaling upcoming rewards.

    Purpose of the Study:

    • To investigate the maintaining variables for responding on initial links in a two-key choice procedure.
    • To determine if conditioned reinforcement from terminal-link stimuli influences initial-link responding in pigeons.
    • To re-evaluate the theoretical underpinnings of performance in chained and tandem schedules.

    Main Methods:

    • Pigeons were trained on a concurrent two-key choice procedure with variable-interval initial links.
    • Terminal links consisted of two-component chained or tandem schedules leading to primary reinforcement.
    • Response distributions and effects of terminal-link schedule properties on initial-link responding were analyzed.

    Main Results:

    • Initial-link responses were equally distributed when terminal links offered identical interreinforcement intervals.
    • Neither the presence nor duration of differentially signaled terminal-link components affected initial-link responding.
    • Responding on initial links was independent of the terminal-link schedule's structure or component signaling.

    Conclusions:

    • Initial-link responding is maintained by direct, delayed primary reinforcement, not conditioned reinforcement.
    • Stimuli correlated with terminal-link components may serve discriminative functions rather than providing conditioned reinforcement.
    • Findings necessitate a reinterpretation of complex schedule performance, emphasizing delayed primary reinforcement.

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