The structure of peritraumatic dissociation: a cross-validation in clinical and nonclinical samples

M. Sijbrandij; I.M. Engelhard; M. Olff; B.C. Opmeer; A.G.J. Van de Schoot; I.V.E. Carlier; B.P.R. Gersons

doi:10.1002/jts.21716

The structure of peritraumatic dissociation: a cross-validation in clinical and nonclinical samples

M. Sijbrandij, I.M. Engelhard, M. Olff, B.C. Opmeer, A.G.J. Van de Schoot, I.V.E. Carlier, B.P.R. Gersons

Clinical Psychology

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Empirical data have challenged the unidimensionality of the Peritraumatic Dissociative Experiences Questionnaire (PDEQ), a widely used measure for peritraumatic dissociation. The aim of this study was to assess the factor structure of the PDEQ in 3 trauma-exposed samples: (a) trauma-exposed police officers (N = 219); (b) trauma-exposed civilians (N = 158); and (c) treatment-seeking trauma-exposed civilians (N = 185). Confirmatory factor analyses using measurement invariance testing supported a 2-factor structure (CFIs .96-.98; RMSEAs .07-.09), but excluded 2 of the original items. Factor 1 was termed Altered Awareness; Factor 2 was termed Derealization. Altered Awareness reflected disturbances in information processing during the traumatic event, whereas Derealization reflected distortions in perception. Hierarchical linear regression analysis showed that Derealization predicted posttraumatic stress severity at 26.5 weeks follow-up only in the sample of police officers (R

Original language	English
Pages (from-to)	475-479
Number of pages	5
Journal	Journal of Traumatic Stress
Volume	25
Issue number	4
DOIs	https://doi.org/10.1002/jts.21716
Publication status	Published - 2012

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title = "The structure of peritraumatic dissociation: a cross-validation in clinical and nonclinical samples",

abstract = "Empirical data have challenged the unidimensionality of the Peritraumatic Dissociative Experiences Questionnaire (PDEQ), a widely used measure for peritraumatic dissociation. The aim of this study was to assess the factor structure of the PDEQ in 3 trauma-exposed samples: (a) trauma-exposed police officers (N = 219); (b) trauma-exposed civilians (N = 158); and (c) treatment-seeking trauma-exposed civilians (N = 185). Confirmatory factor analyses using measurement invariance testing supported a 2-factor structure (CFIs .96-.98; RMSEAs .07-.09), but excluded 2 of the original items. Factor 1 was termed Altered Awareness; Factor 2 was termed Derealization. Altered Awareness reflected disturbances in information processing during the traumatic event, whereas Derealization reflected distortions in perception. Hierarchical linear regression analysis showed that Derealization predicted posttraumatic stress severity at 26.5 weeks follow-up only in the sample of police officers (R",

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AU - Sijbrandij, M.

AU - Engelhard, I.M.

AU - Olff, M.

AU - Opmeer, B.C.

AU - Van de Schoot, A.G.J.

AU - Carlier, I.V.E.

AU - Gersons, B.P.R.

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AB - Empirical data have challenged the unidimensionality of the Peritraumatic Dissociative Experiences Questionnaire (PDEQ), a widely used measure for peritraumatic dissociation. The aim of this study was to assess the factor structure of the PDEQ in 3 trauma-exposed samples: (a) trauma-exposed police officers (N = 219); (b) trauma-exposed civilians (N = 158); and (c) treatment-seeking trauma-exposed civilians (N = 185). Confirmatory factor analyses using measurement invariance testing supported a 2-factor structure (CFIs .96-.98; RMSEAs .07-.09), but excluded 2 of the original items. Factor 1 was termed Altered Awareness; Factor 2 was termed Derealization. Altered Awareness reflected disturbances in information processing during the traumatic event, whereas Derealization reflected distortions in perception. Hierarchical linear regression analysis showed that Derealization predicted posttraumatic stress severity at 26.5 weeks follow-up only in the sample of police officers (R

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The structure of peritraumatic dissociation: a cross-validation in clinical and nonclinical samples

Abstract

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