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Related Experiment Video

Updated: Jul 9, 2026

Murine Drinking Models in the Development of Pharmacotherapies for Alcoholism: Drinking in the Dark and Two-bottle Choice

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A further look at the Institutionalized Chronic Alcoholic Scale.

R J Rhodes, A F Chang

Journal of Clinical Psychology

|July 1, 1978

Summary

A new MMPI scale, the Institutionalized Chronic Alcohol Scale (ICAS), effectively distinguishes alcoholics from neurotics. However, it is less accurate than existing scales and not recommended for differentiating alcoholics from other patient groups.

Area of Science:

Psychological assessment
Clinical psychology
Addiction research

Background:

The need for accurate diagnostic tools in identifying alcoholism.
Limitations of existing scales in differentiating alcoholics from other clinical populations.

Purpose of the Study:

To evaluate the efficacy of a newly developed MMPI scale, the Institutionalized Chronic Alcohol Scale (ICAS).
To assess the ICAS's ability to differentiate between male alcoholics and neurotic patients.

Main Methods:

Utilized a sample of 75 alcoholic and 50 neurotic male inpatients from Veterans Administration Hospitals.
Administered the ICAS and compared its diagnostic accuracy with established alcoholism scales (MacAndrew and Holmes).
Included data from 30 male heroin addicts to assess scale specificity.

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Main Results:

The ICAS demonstrated a 78% accuracy in distinguishing alcoholics from neurotics.
Its effectiveness was found to be slightly lower than the MacAndrew (Amac) and Holmes (Am) scales.
Data suggested the ICAS is not suitable for differentiating alcoholics from non-neurotic patient groups, such as heroin addicts.

Conclusions:

The ICAS shows promise in identifying alcoholics among neurotic patients but is not superior to existing measures.
Further research is needed to refine the ICAS and determine its appropriate clinical applications.
The scale's limitations necessitate caution when applying it to diverse patient populations beyond neurotics.