Assessing Trauma-Related Dissociation in Forensic Contexts: Addressing Trauma-Related Dissociation as a Forensic Psychologist,Part II

Chronic dissociative reactions and dissociative disorders can occur following traumatic events and are associated with suffering and impaired functioning. Therefore, trauma-related dissociation could be part of the claims made in civil actions or contribute to mitigation or an insanity defense in criminal actions. Dissociative reactions to trauma, including dissociative disorders, are more common than most mental health professionals realize. Unfortunately, few professionals have training in the assessment of dissociation, and forensic experts may be unaware of research indicating that standard interpretations of well-regarded assessment instruments can result in inaccurate determinations of symptom exaggeration in cases with dissociation. This paper is the second paper of a two-part series that aims to expand assessors’ knowledge about trauma-related dissociation (TRD) and enhance their ability to assess and present information about dissociation. In this article, we focus on the forensic assessment of TRD and discuss: dissociative symptoms; complex trauma; trauma-related disorders; an approach to assessment of TRD; trauma-related reactions that can impede the detection of TRD; and differential diagnosis of genuine versus feigned dissociation. In addition, we review research related to the validity and appropriate interpretation of the following measures in use with persons with TRD: Dissociative Experiences Scale, Multiscale Dissociation Inventory, Somatoform Dissociation Questionnaire, Trauma Symptom Inventory-2, Multidimensional Inventory of Dissociation, Structured Clinical Interview for Dissociative Disorders-Revised, Minnesota Multiphasic Personality Inventory-2, Personality Assessment Inventory, Structured Interview of Reported Symptoms, Test of Memory Malingering, and the Gudjonsson Suggestibility Scale.