Upcoming classes
(open for all)
Date: Thursday 11 June 2026
Time: 8pm Berlin/Amsterdam/Brussels time (GMT+1)
Duration: 90 minutes
Tutor: Ellert Nijenhuis, Ph.D.
Can’t attend live? Ticket holders will receive access to the recording of the public masterclass for 7 days. Certification of participation: We only provide “Certification of participation” to annual eAcademy members.
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Does what I long for count in trauma therapy? Or must I simply adhere to techniques and protocols?
Do you sometimes struggle to make real clinical progress with trauma patients — even when you’re applying the right techniques and carefully following protocols? Do supervisors ever leave you doubting your own abilities? Ellert offers a unique perspective on these situations. Attend this Public Masterclass to gain greater clarity and renewed clinical confidence.
In this Public Masterclass series, Ellert Nijenhuis starts sharing what he learned while working with dissociative patients for over 40 years. His goal is to help you gain clarity and feel more confident in your therapeutic work with people with DID.
This public masterclass is ideal for:
Psychotherapists, psychiatrists, and other therapy practitioners
Including clinicians working with complex trauma and dissociative disorders.
Educational and psychosocial professionals
Who support children, adolescents, or adults with complex trauma histories.Medical, psychology, and healthcare students
With an interest in trauma, dissociation, and clinical practice. Sign up with your university’s email address and receive access to the second and third masterclass for free.
About Ellert Nijenhuis
As a -now, retired-psychologist and psychotherapist, Ellert has diagnosed, treated and scientifically studied severely traumatised patients for over 40 years. He developed the Somatoform Dissociation Questionnaire (SDQ-20) and his publications include the book Somatoform Dissociation and the trilogy The Trinity of Trauma: Ignorance, Fragility, and Control. With Onno van der Hart and Kathy Steele he co-authored the book The Haunted Self: Structural Dissociation and the Treatment of Chronic Traumatization.
Nijenhuis has been one of the founders of the ESTD. The International Society for the Study of Trauma and Dissociation granted him several awards, including the Lifetime Achievement Award.
Since 2014, he specifically concentrates on sharing his experience and knowledge regarding the psychology, psychobiology, and treatment of chronic traumatisation and dissociation.
Live online public masterclass by Ellert Nijenhuis
Date: 24 September 2026
Time: 8pm Berlin/Amsterdam/Brussels time (GMT+1)
Indication of time in different time zones, but please do check yourself especially given the change from summer winter time: 2pm EST, 12pm PST, 7pm GMT
Cannot attend live?
Ticket holders have the opportunity to watch the recording for one week after receiving the video recording link.
For whom:
Psychotherapists, psychiatrists, and other therapy practitioners
Including clinicians working with complex trauma and dissociative disorders.
Educational and psychosocial professionals
Who support children, adolescents, or adults with complex trauma histories.Medical, psychology, and healthcare students
With an interest in trauma, dissociation, and clinical practice.
Free online Library
In our free eLibrary you can watch webinar videos and download diagnostic tools, articles and manuscripts, includingL
> SDQ-5 and SDQ-20
> TEC
> 50+ articles by Ellert and colleagues
The eLibrary password will appear immediately after you send your e-mail address.
The Trinity of Trauma
The Trinity of Trauma describes enactive trauma therapy both theoretically and practically.
The first two volumes of his Trauma Trilogy, The Evolving Concept of Trauma, and The Concept and Facts of Dissociation in Trauma, are predominantly conceptual, theoretical, and empirical in nature. Volume III presents a rich trove of clinical case material.
View Trinity of Trauma on Amazon >
“The best book I have read on psychotherapy with people with Dissociative Disorders.”
- Verified Amazon review.
Ellert Nijenhuis
As a -now, retired-psychologist and psychotherapist, Ellert has diagnosed, treated and scientifically studied severely traumatised patients for over 40 years.
Since 2014, he specifically concentrates on sharing his experience and knowledge regarding the psychology, psychobiology, and treatment of chronic traumatisation and dissociation.
Accolades
Winner ISSTD
Life Time Achievement award
Granted by the ISSTD
International Society for the
Study of Trauma and Dissociation
in 2011
Winner ISSD
Pierre Janet Writing Award
Pierre Janet Writing Award 2000 of the International Society for the Study of Dissociation for the book Somatoform Dissociation Phenomena, Measurement, and Theoretical Issues
Knight
in the Order of the Dutch Lion
Appointed by the Dutch Queen Knight in the Order of the Dutch Lion for his outstanding clinical, educational and scientific activities in the field of chronic traumatisation in 2004
SDQ-20
The twenty item Somatoform Dissociation Questionnaire (SDQ-20) evaluates the severity of somatoform manifestations of dissociation of the personality (Nijenhuis et al., 1996). Its psychometric characteristics are very satisfactory. The instrument is completed within a few minutes.
SDQ-5
The five item SDQ-5 is a screener for dissociative disorders. The instrument performed well in some studies, but less well in other studies.
TEC
The Traumatic Experience Checklist (Nijenhuis et al., 2002) is a self-report measure addressing potentially traumatising events. It is a reliable and valid self-report instrument that can be used in clinical practice and research.
Meet our Associates
The Associates help us to train and support more trauma therapists worldwide.
All Associates give trainings and can be booked for private online supervision >
Curious about our background?
Read more about us >