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Updated: Jul 10, 2026
07:32
Novel Apparatus and Method for Drug Reinforcement
Published on: August 21, 2010
The observing-response procedure: a novel method to study drug-associated conditioned reinforcement
1Department of Psychology, University of New Hampshire, Durham 03824, USA. tshahan@cisunix.unh.edu
Experimental and Clinical Psychopharmacology
|February 28, 2002
Summary
This study shows that stimuli associated with ethanol (alcohol) self-administration can maintain observing behavior even when the drug is unavailable. This suggests conditioned reinforcement from drug cues can persist independently of the primary drug reward.
Area of Science:
- Behavioral neuroscience
- Addiction research
- Pharmacology
Background:
- Drug self-administration is a key model for studying addiction.
- Conditioned reinforcement, where stimuli associated with a drug gain reinforcing properties, plays a crucial role in relapse.
- Existing methods for studying conditioned reinforcement have limitations for long-term analysis.
Purpose of the Study:
- To adapt the observing-response procedure for studying drug-associated conditioned reinforcement.
- To investigate the persistence of conditioned reinforcement effects independently of the primary drug reinforcer.
- To develop a method providing independent measures of conditioned reinforcing and discriminative stimulus effects.
Main Methods:
- Rats responded for oral ethanol under a random-ratio schedule or extinction.
- Observing behavior, which produced stimuli associated with these periods, was measured.
- A vehicle control condition was used to assess drug-specific effects.
Main Results:
- Observing behavior was acquired and maintained during ethanol self-administration and extinction periods.
- In the vehicle control, both self-administration and observing behavior decreased.
- Observing behavior decreased less proportionally than vehicle consumption, indicating persistent conditioned reinforcement.
Conclusions:
- Stimuli associated with ethanol self-administration can act as conditioned reinforcers.
- These conditioned reinforcement effects can persist even when the primary drug reinforcer is absent.
- The adapted observing-response procedure offers a valuable tool for long-term studies of drug-associated conditioned reinforcement.
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