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Conditioned drinking as avoidance learning.

S Mineka, M E Seligman

Journal of Comparative and Physiological Psychology

|January 1, 1975

Summary

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Rats overdrink to avoid illness. Blocking this drinking response prevents conditioned responses to isotonic procaine but not hypertonic procaine, suggesting a distinct avoidance mechanism.

Area of Science:

Behavioral neuroscience
Pharmacology

Background:

Conditioned responses (CRs) are learned behaviors triggered by specific stimuli.
Procaine, a local anesthetic, can induce conditioned responses in rats, including drinking behavior.

Purpose of the Study:

To investigate the role of the conditioned drinking response in procaine-induced conditioned responses.
To differentiate the effects of isotonic versus hypertonic procaine on conditioned drinking behavior and its extinction.

Main Methods:

Rats were conditioned to associate procaine injections with drinking behavior.
Response blocking was employed during extinction trials to prevent drinking.
The effects of blocking on conditioned responses to isotonic and hypertonic procaine were assessed.

Related Experiment Videos

Main Results:

Blocking the conditioned drinking response eliminated the conditioned response to isotonic procaine but not hypertonic procaine.
Rats that drank during conditioning showed a larger conditioned response.
Response blocking during extinction was less effective if no drinking occurred during baseline or conditioning.

Conclusions:

The conditioned drinking response is crucial for isotonic procaine-induced conditioned responses.
Rats may overdrink to avoid anticipated illness, and this behavior is resistant to extinction if the absence of illness is not experienced.
Distinct mechanisms may underlie conditioned responses to isotonic and hypertonic procaine.