How to Use the Dissociative Disorders Interview Schedule

The Dissociative Disorders Interview Schedule DSM-5 Version (DDIS) is a structured interview that diagnoses the DSM-5 dissociative disorders plus somatic symptom disorder, major depressive disorder, and borderline personality disorder. As well, it inquires about childhood physical and sexual abuse, substance abuse, psychotic symptoms, ESP/paranormal experiences and past psychiatric history. The DDIS has been shown to be valid and reliable and is included in the American Psychiatric Association’s Handbook of Psychiatric Measures. The DDIS is usually administered along with the Dissociative Experiences Scale (DES). Attendees will be shown examples of data from DDIS research studies and then will be taught how to administer the DDIS; they will be provided with copies of the DES, the DDIS and its scoring rules. This includes a consent form for the DDIS. The DES and DDIS are public domain documents and can be used without permission. The DDIS takes 30-40 minutes to administer and can be used in any setting. After thousands of administrations to clinical and non-clinical samples, the author has encountered no severe adverse reactions to using.

This session was originally presented as a live conference session in May 2020.

Target Audience


Learning Objectives

At the conclusion of this session participants will be able to:

  • Describe the use of the Dissociative Experiences Scale for screening purposes
  • Describe the use of the Dissociative Disorders Interview Schedule for evaluation and diagnostic purposes
  • Describe research data on the Dissociative Disorders Interview Schedule
Course summary
Available credit: 
  • 1.50 ISSTD Certificate Program
    This program is eligible for 1.50 credits in the ISSTD Certificate Program.
Course opens: 
Course expires: 
ISSTD Member cost:
Your Price:

Presenter: Colin Ross, MD
Presenter Bio: Colin Ross, MD is an internationally renowned clinician, researcher, author and lecturer in the field of dissociation and trauma-related disorders. He is the founder and President of The Colin A. Ross Institute for Psychological Trauma.  

Dr. Ross obtained his MD from the University of Alberta in 1981 and completed his training in psychiatry at the University of Manitoba in 1985. He has been running a hospital-based Trauma Program in Dallas, Texas since 1991.  

Dr. Ross's book, The Trauma Model: A Solution To the Problem of Comorbidity in Psychiatry, was first published in 2000, with a second edition appearing in 2007. Other books of his include: Trauma Model Therapy: A Treatment Approach for Trauma, Dissociation and Complex Comorbidity (2009), The C.I.A. Doctors: Human Rights Violations by American Psychiatrists (2006), Moon Shadows: Stories of Trauma & Recovery (2007), Structural Dissociation: A Proposed Modification of the Theory (2013), The Trump Card: A Psychiatrist Analyzes Reactions to Donald Trump (2017), Treatment of Dissociative Identity Disorder (2018), Be A Teammate With Yourself (2019), The Genetics of Schizophrenia (2020), and Opus 5 In B Flat And Other Poems (2020).  

Dr. Ross has authored 34 books and over 230 professional papers, has reviewed for numerous professional journals and grant agencies, and is a past President of the International Society for the Study of Trauma and Dissociation. He has appeared in a number of television documentaries and has published essays, aphorisms, poetry, short stories, and screenplays. Dr. Ross is adept at imparting complex information to diverse professional audiences on a variety of subjects. He has spoken widely throughout North America and Europe and in China, Malaysia, Australia and New Zealand. 


Available Credit

  • 1.50 ISSTD Certificate Program
    This program is eligible for 1.50 credits in the ISSTD Certificate Program.


ISSTD Member cost:
Your Price:
Please login or register to take this course.

"Your Price" above reflects your final price based on your membership status and career level. 

  • ISSTD defines a student as those enrolled in a program of study leading to a degree or certification in the mental health field and who have an interest in trauma and dissociation. 
  • ISSTD defines an emerging professional as mental health professionals who have completed an advanced degree and are in the first three years of their career (or first three years after graduation for researchers).
  • If you do not fall into one of the above categories please register as Professional/Retired. 

These prices are for Tier I countries. For a list of countries by Tier click here. If you are located in a country that falls into Tier II-VI please contact ISSTD at to receive the appropriate discount code.