The aim of this study is to analyze the reliability and validity of the Brazilian–Portuguese version of the Defensive Style Questionnaire (DSQ). Participants were evaluated by clinical interview and the Mini-International Neuropsychiatric Interview. Reliability was assessed by factor analysis and Cronbach's alpha. The 3-factor model's replication was tested using confirmatory factor analysis (CFA). Controls were reevaluated after 4 months to assess test–retest reliability. Subsamples were also evaluated using the Minnesota Multiphasic Personality Inventory and Defensive Functioning Scale (DFS). Factor analysis of the various defense mechanisms produced a distribution of mechanisms among the factors that was largely similar to previous analyses based on the original instrument. The 3-factor model was supported by CFA. The test–retest evaluation showed sufficient intraclass correlation for all factors. Patients used more immature and neurotic defenses than controls. There was a correlation between DFS and immature defenses. Individuals with pathological personality traits scored higher on the immature and neurotic factors than those without. The Brazilian–Portuguese version of the DSQ-40 has psychometric features that allow the use of this instrument in our culture.
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Blaya et al. (2007) studied this question.
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