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Response-rate differences in variable-interval and variable-ratio schedules: An old problem revisited.

M R Cole

    Journal of the Experimental Analysis of Behavior
    |May 1, 1994
    PubMed
    Summary
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    This study investigated how different reinforcement schedules affect rat behavior. Findings suggest reinforced response times and rate correlations influence response rates in variable-ratio and variable-interval schedules.

    Area of Science:

    • Behavioral Psychology
    • Animal Behavior Studies
    • Operant Conditioning

    Background:

    • Understanding reinforcement schedules is crucial for behavioral analysis.
    • Variable-ratio (VR) and variable-interval (VI) schedules produce distinct response patterns.
    • Yoking techniques allow for direct comparison of schedule components.

    Purpose of the Study:

    • To examine the impact of yoked reinforcement schedules on response rates in rats.
    • To differentiate the roles of interreinforcement intervals and reinforced interresponse times.
    • To assess response rate stability under modified tandem schedules.

    Main Methods:

    • Experiment 1: Rats were exposed to VR10, then yoked VI schedules with partial or full yoking of interval and response time parameters.

    Related Experiment Videos

  • Experiment 2: Rats were exposed to tandem VI-VR schedules, then yoked tandem schedules with equated overall interreinforcement times.
  • Response rates were systematically measured under all schedule conditions.

    • Main Results:

    • In Experiment 1, response rates under partial yoking were lower than VR but higher than full yoking.
    • Full yoking in Experiment 1 resulted in intermediate response rates.
    • Experiment 2 showed stable response rates in yoked tandem schedules despite longer reinforced interresponse times.

    Conclusions:

    • Reinforced interresponse times and response rate-reinforcement rate correlations significantly influence response rates in VR and yoked VI schedules.
    • The reinforced interresponse time plays a minimal role in determining response rates for specific yoked tandem schedules.