Predicting personality disorder traits with the Defense Style Questionnaire in a normal sample

Area of Science:

• Psychology
• Psychopathology
• Personality Assessment

Background:

• Defense mechanisms are psychological strategies used to cope with reality and maintain self-image.
• The Defense Style Questionnaire (DSQ-40) assesses mature, neurotic, and immature defense styles.
• Understanding the relationship between defense styles and personality disorders is crucial for clinical assessment.

Purpose of the Study:

• To evaluate the predictive efficacy of the DSQ-40 in relation to DSM-III-R personality disorders.
• To investigate the association between mature, neurotic, and immature defense styles and various personality disorders.
• To determine the extent to which defense styles explain variance in personality disorder measures.

Main Methods:

• Utilized the 40-item Defense Style Questionnaire (DSQ-40) for defense style assessment.
• Employed the Coolidge Axis II Inventory, Millon Clinical Multiaxial Inventory-II, and MMPI personality disorder scales to diagnose 11 personality disorders.
• Analyzed data from a nonclinical sample using multiple regression.

Main Results:

• Most personality disorders showed a positive association with immature defense styles and a negative association with mature defense styles.
• Defense styles accounted for a significant portion of the variance in personality disorder measures, ranging from 2% to 42%.
• Specific personality disorders could not be reliably predicted by defense styles across all measures.

Conclusions:

• Defense styles are broadly associated with personality disorder pathology, with immature styles linked to poorer outcomes.
• While defense styles offer predictive value for general personality disorder traits, they lack specificity for individual disorder prediction.
• Further research may explore nuanced relationships and clinical utility of defense style assessment in personality disorders.