A psychometric assessment of Disturbances in Self-Organization symptom indicators for ICD-11 Complex PTSD using the International Trauma Questionnaire. Issue 1 (1st January 2018)

• Record Type: Journal Article
• Authors: Shevlin, Mark; Hyland, Philip; Roberts, Neil P.; Bisson, Jonathan I.; Brewin, Chris R; Cloitre, Marylene
• Is Part Of: European journal of psychotraumatology. Volume 9:Issue 1(2018)
• Publication Date: 2018-01-01
• Subjects: ICD-11 PTSD -- ICD-11 Complex PTSD -- Disturbances in Self-Organization (DSO) -- item response theory; TEPT de la CIE-11 -- TEPT-C de la CIE-11 -- perturbaciones en la autoorganización (DSO) -- teoría de respuesta al ítem.; ICD-11 PTSD，ICD-11 复杂 CPTSD ，自我组织失调(DSO)，项目反应理论; Two 'sibling disorders' have been proposed for the 11th version of the International Classification of Diseases (ICD-11): Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). The definition of CPTSD includes the six PTSD symptoms but is distinguished from PTSD on the basis of an additional set of symptoms that reflect 'Disturbances in Self-Organization' (DSO). DSO symptoms are defined by three clusters: (1) affective dysregulation (AD), (2) negative self-concept (NSC), and (3) disturbances in relationships (DR). This study assessed the performance of 16 DSO symptom indicators from the International Trauma Questionnaire.; Post-traumatic stress disorder -- Periodicals; Stress Disorders, Post-Traumatic; Post-traumatic stress disorder; Electronic journals; Periodicals; Periodicals; Fulltext; Internet Resources; Periodicals; 616.8521
• DOI: 10.1080/20008198.2017.1419749
• Languages: English
• ISSNs: 2000-8198

Abstract

ABSTRACT: Background : Two 'sibling disorders' have been proposed for the 11 th version of the International Classification of Diseases (ICD-11): Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). To date, no research has attempted to identify the optimal symptom indicators for the 'Disturbances in Self-Organization' (DSO) symptom cluster. Objective : The aim of the current study was to assess the psychometric performance of scores of 16 potential DSO symptom indicators from the International Trauma Questionnaire (ITQ). Criteria relating to score variability and their ability to discriminate were employed. Method : Participants ( N = 1839) were a nationally representative household sample of non-institutionalized adults currently residing in the US. Item scores from the ITQ were examined in relation to basic criteria associated with interpretability, variability, homogeneity, and association with functional impairment. The performance of the DSO symptoms was also assessed using 1- and 2-parameter item response theory (IRT) models. Results : The distribution of responses for all DSO indicators met the criteria associated with interpretability, variability, homogeneity, and association with functional impairment. The 1-parameter graded response model was considered the best model and indicated that each set of indictors performed very similarly. Conclusions : The ITQ contains 16 DSO symptom indicators and they perform well in measuring their respective symptom cluster. There was no evidence that particular indicators were 'better' than others, and it was concluded that the indicators are essentially interchangeable.