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Related Experiment Videos

Behavioral contrast in fixed-interval components: effects of extinction-component duration.

J C de Rose

    Journal of the Experimental Analysis of Behavior
    |March 1, 1986
    PubMed
    Summary

    Increasing extinction component duration in a multiple schedule of reinforcement inversely affected response rates in rats. Shorter fixed interval values showed more pronounced effects, suggesting a link between relative component duration and behavioral contrast.

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    Area of Science:

    • Behavioral Psychology
    • Animal Behavior Studies
    • Operant Conditioning

    Background:

    • Multiple schedules of reinforcement involve alternating behavioral components.
    • Extinction components involve the absence of reinforcement.
    • Fixed interval schedules deliver reinforcement after a set time period.

    Purpose of the Study:

    • To investigate the effect of increasing extinction component duration on fixed interval responding in rats.
    • To determine the relationship between relative component duration and response rate.
    • To explore potential links between behavioral contrast and Pavlovian conditioning.

    Main Methods:

    • Seven albino rats were exposed to a multiple schedule (fixed interval-extinction).
    • Extinction component duration was systematically increased during probe sessions.

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  • Response rates during fixed interval components were compared across different extinction durations.

    • Main Results:

    • Response rate within fixed intervals increased as extinction duration increased.
    • Initial post-reinforcement pausing in fixed intervals decreased with longer extinction durations.
    • These effects were more pronounced with shorter fixed interval values (18s and 30s).

    Conclusions:

    • A functional relationship exists between relative component duration and responding in multiple schedules.
    • A higher relative duration of the extinction component leads to an inverse relationship between relative component duration and response rate.
    • Behavioral contrast may be influenced by underlying Pavlovian contingencies in multiple schedules.