ANS52(1)24-28 - ACTIVITAS NERVOSA SUPERIOR Activitas...

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Activitas Nervosa Superior 2010; 52 :1,24-28 24 THE SCORING AND INTERPRETATION OF THE SDQ-20 AND SDQ-5 Ellert R.S. Nijenhuis * Mental Health Care Drenthe Outpatient Department, Assen, The Netherlands Received November 12, 2010; accepted November 21, 2010 Abstract The 20-item Somatoform Dissociation Questionnaire (SDQ-20; Nijenhuis, Spinhoven, Van Dyck, Van der Hart, & Van- derlinden, 1996) evaluates the severity of somatoform dissociation. The SDQ-20 items were derived from a pool of 75 items describing clinically observed somatoform dissociative symptoms that in clinical settings had appeared upon reac- tivation of particular dissociative parts of the personality and that could not be medically explained. The SDQ-20 scores were best predicted by self-reported physical and sexual traumatization in patients with dissociative disorders and psy- chiatric controls (Nijenhuis et al., 1998c), even after statistically controlling for self-reported emotional traumatization (emotional neglect and emotional abuse). These traumatization scores were composed of four factors, i.e. presence of trauma, duration of trauma, relationship to perpetrator, and subjectively rated impact of trauma. Key words: Dissociation; Somatoform dissociation; Somatoform Dissociation Questionnaire; Reliability; Validity INTRODUCTION The 20-item Somatoform Dissociation Questionnaire (SDQ-20; Nijenhuis, Spinhoven, Van Dyck, Van der Hart, & Vanderlinden, 1996) evaluates the severity of somatoform dissociation. The SDQ-20 items were derived from a pool of 75 items describing clinically observed somatoform dissociative symptoms that in clinical settings had appeared upon reactivation of particular dissociative parts of the personality and that could not be medically explained. The items pertain to negative (e.g., analgesia) and positive dissociative phenomena (e.g., site-specific pain). SCORING The items are supplied with a Likert-type 5-point scale, ranging from "1 = this applies to me NOT AT ALL" to "5 = this applies to me EXTREMELY." The respondent is also asked to indicate whether a physician has connected the symptom or bodily experience with a physical disease. In our SDQ-studies, we have not adjusted the item scores when physical disease was indicated, as such indications often did not seem to be accurate. For example, the respondent might interpret "hyperventilation" as a physical disease. We therefore suggest that the item scores are not adjusted for indicated physical disease when the SDQ-20 (or SDQ-5) is used for research purposes. However, in clinical practice one may wish to adjust the relevant item score to "1" when physical disease is indicated, the medical diagnosis has been checked with the physician who assigned it, and this diagnosis seems valid. The SDQ-20 score, which may range from 20 to 100, is
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This note was uploaded on 03/08/2011 for the course CLINICAL P 2010 taught by Professor Actnervsuper during the Spring '11 term at The Chicago School of Prof. Psychology.

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ANS52(1)24-28 - ACTIVITAS NERVOSA SUPERIOR Activitas...

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