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The Defense Style Questionnaire

G Andrews¹, M Singh, M Bond

¹School of Psychiatry, University of New South Wales, St. Vincent's Hospital, Darlinghurst, Sydney, Australia.

The Journal of Nervous and Mental Disease

|April 1, 1993

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A revised 40-item Defense Style Questionnaire (DSQ) reliably measures defense mechanisms. This updated DSQ shows scores are unaffected by respondent sex, but immature defense styles decrease with age.

Area of Science:

Psychology
Psychiatry
Personality Assessment

Background:

The Defense Style Questionnaire (DSQ) is a key instrument for assessing defense mechanisms.
Previous versions required further refinement for broader clinical and research application.

Purpose of the Study:

To develop and validate a concise, reliable 40-item version of the Defense Style Questionnaire.
To provide updated normative and reliability data for diverse populations.

Main Methods:

A 72-item DSQ based on DSM-III-R criteria was administered to 388 controls and 324 patients.
Item reduction utilized eight statistical and two a priori criteria to select two items per defense.
Normative and reliability data were collected from healthy individuals, anxiety disorder patients, and child-abusing parents.

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Main Results:

A new 40-item DSQ was developed and validated.
The revised DSQ demonstrated good reliability across different groups.
Defense style scores were independent of respondent sex.
The use of immature defense styles significantly decreased with increasing age.

Conclusions:

The 40-item DSQ is a reliable and valid measure of defense styles.
The findings provide valuable normative and reliability data for clinical and research use.
Age-related changes in defense style endorsement were confirmed.