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Reinforcer revaluation and conditioned place preference

S M Perks¹, P G Clifton

¹Laboratory of Experimental Psychology, University of Sussex, Brighton, UK.

Physiology & Behavior

|January 1, 1997

Summary

Conditioned place preference (CPP) tests reveal how animals respond to changes in motivation. Rats demonstrated preferences based on hunger or thirst, and these preferences shifted when the reward

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Area of Science:

Behavioral neuroscience
Animal behavior research
Learning and memory

Background:

Conditioned place preference (CPP) is a valuable tool for assessing animal motivation.
Understanding how motivational states influence behavior is crucial in neuroscience.

Purpose of the Study:

To investigate the sensitivity of CPP tests to changes in motivational state.
To examine the impact of reinforcer devaluation on place preference.

Main Methods:

Rats were exposed to environments paired with food or fluid reinforcers under different motivational states (hunger/thirst).
A second experiment used a sucrose solution, followed by taste aversion conditioning (LiCl) to devalue the reinforcer.
Different groups experienced varying numbers of taste aversion conditioning sessions and non-reinforced exposures.

Main Results:

Rats showed appropriate place preferences based on their current motivational state (hunger or thirst).
Taste aversion conditioning led to significant place aversion and reduced consumption of the devalued sucrose solution.
The degree of place aversion and reduced consumption correlated with the intensity of the taste aversion procedure.

Conclusions:

CPP tests are highly sensitive to alterations in an animal's motivational state.
The value of a reinforcer significantly impacts place preference, as demonstrated by devaluation effects.
These findings highlight the utility of CPP in studying reward processing and motivation.

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