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Related Experiment Video

Updated: Apr 28, 2026

A Procedure to Observe Context-induced Renewal of Pavlovian-conditioned Alcohol-seeking Behavior in Rats
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A Procedure to Observe Context-induced Renewal of Pavlovian-conditioned Alcohol-seeking Behavior in Rats

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Exposure to context may contribute to within-session changes in responding.

F K McSweeney1, S Swindell1, J N Weatherly2

  • 1Department of Psychology, Washington State University, Pullman, WA 99164-4820, USA.

Behavioural Processes
|June 5, 2014
PubMed
Summary
This summary is machine-generated.

Delayed session starts reduced operant response rates in rats and pigeons. This suggests arousal or context sensitization, not just reinforcement factors, influences behavior within experimental sessions.

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Area of Science:

  • Behavioral Psychology
  • Operant Conditioning
  • Animal Behavior

Background:

  • Within-session changes in operant responding are typically attributed to reinforcement-related factors like satiation.
  • However, the precise mechanisms driving these changes remain incompletely understood.

Purpose of the Study:

  • To investigate the influence of delayed session initiation on operant responding in rats and pigeons.
  • To determine if reinforcement-related factors fully explain within-session response rate changes.

Main Methods:

  • Rats and pigeons were exposed to multiple variable interval schedules (30-s and 60-s).
  • Experimental sessions (60 min) were initiated at random intervals (0, 5, 10, 15, or 30 min) after animal placement in the enclosure.

Main Results:

  • Delayed session starts generally resulted in higher early-session response rates.
  • The increase in responding during the early session was smaller with delayed starts compared to immediate starts.
  • These findings indicate that reinforcement factors alone do not account for all within-session response variations.

Conclusions:

  • Factors beyond reinforcement, such as arousal or sensitization to the experimental context, significantly contribute to within-session operant responding.
  • The study provides a potential explanation for the phenomenon of spontaneous recovery in extinguished behaviors.