Like all psychiatric disorders, the gold standard for diagnosing trauma-related disorders is the clinical interview. Throughout psychiatry, standardized methods of history taking are also employed for systematic clinical assessment and research - these are called structured interviews. In the trauma field there are several structured interviews in use, including the Dissociative Disorders Interview Schedule (DDIS), developed by Dr. Ross.
Data from the DDIS appear in many of the scientific papers listed under Publications on this web site.
The full text and scoring rules of the DDIS appear below. Clinical diagnoses should not be made using the DDIS alone. The DDIS should not be used for making clinical or research diagnoses by persons who are not mental health professionals or who are not acting under the supervision or in consultation with qualified mental health professionals. The DDIS has been placed on this web site as an educational service only.