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Operant variability when reinforcement is delayed.

Katie Wagner1, Allen Neuringer

  • 1Reed College, Portland, OR, USA.

Learning & Behavior
|August 29, 2006
PubMed
Summary
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Reinforced operant response variability in rats remained largely unaffected by delayed rewards, unlike typical operant responding. This suggests variability is a robust behavior controlled by reinforcement contingencies.

Area of Science:

  • Behavioral science
  • Animal behavior studies
  • Operant conditioning research

Background:

  • Operant responses typically weaken with delays between response and reinforcement.
  • Reinforcement schedules are crucial in shaping animal behavior.
  • Understanding factors influencing operant response variability is key.

Purpose of the Study:

  • To investigate the impact of delayed reinforcement on operant response variability in rats.
  • To determine if reinforced response variability is more resistant to delay than repetitive responding.
  • To analyze how different baseline levels of variability interact with delayed reinforcement.

Main Methods:

  • Three groups of rats were trained to vary their operant response sequences.
  • Groups were rewarded for high, middle, and low levels of response variability.

Related Experiment Videos

  • Reinforcement delays were systematically increased across all groups.

    • Main Results:

    • Responding slowed significantly in all groups as reinforcement delays increased.
    • Despite delays, substantial differences in response variability were maintained across groups.
    • The effect of delays on variability was dependent on baseline levels, showing an interaction.

    Conclusions:

    • Reinforced operant response variability is relatively immune to disruption by delayed reinforcement.
    • Variable operant responding is controlled by reinforcement contingencies, but distinct from repetitive responding.
    • The findings highlight the resilience of behavioral variability under specific reinforcement conditions.