PMID: 9661098Jul 14, 1998Paper

A psychometric evaluation of the Defense Style Questionnaire in methadone patients

Journal of Personality Disorders
M J RutherfordF Mulvaney

Abstract

The self-report Defense Style Questionnaire (DSQ) was designed to assess defenses along a developmental continuum. Factor analysis of the original DSQ suggested that the scale assessed four factors or types of defenses, whereas a more recent factor analysis indicated the DSQ measured three-factors: Immature, Neurotic, and Mature. No data, however, regarding the reliability or unique construct validity of DSQ dimensions was published. This article reports on factor analyses of two DSQ versions in a sample of 215 methadone maintenance patients. Results indicate that both DSQ versions are unidimensional, assessing only Immature defenses. The lack of published psychometric data raises concerns regarding the true reliability of DSQ dimensions reported in previous investigations. Prior statements based on DSQ findings may have been incorrect if the DSQ factors were unreliable. Findings from this investigation stress the importance of requiring and evaluating the psychometric integrity of an instrument before employing it in research.

References

Oct 1, 1992·The Journal of Nervous and Mental Disease·K AkkermanT Lewin

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Citations

Jun 3, 2009·Comprehensive Psychiatry·Antonio PrunasHans Steiner
Nov 5, 2004·Comprehensive Psychiatry·Pietro San MartiniMichael Bond
May 15, 2009·The Journal of Nervous and Mental Disease·Anna ReganJan R Oyebode
Nov 2, 2005·The Journal of Nervous and Mental Disease·Henri ChabrolHenri Sztulman
Feb 16, 2006·The Journal of Nervous and Mental Disease·Titta RuuttuMauri Marttunen
Jul 4, 2001·The Journal of Nervous and Mental Disease·N LaorD V Cicchetti
Jun 21, 2020·International Journal of Environmental Research and Public Health·Michela BonafedeFanny Guglielmucci

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