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Summary

Onno van der Hart offers, nationally and internationally, training and consultation on trauma-related dissociationDissociation is a compartmentalization of experience, where elements of a trauma are not integrated into a unified sense of the self. {{Rp|4-810, 127}}The lay persons idea of [[dissociation]], that which exists in the normal mind, is not what is referred to in this document. {{Rp|233-234}}, complex trauma-related disorders including the dissociative disorders. A psychologistPsychologists usually have an advanced degree, most commonly in clinical psychology, and often has extensive training in research. Psychologists use psychotherapy (often referred to as "talk therapy" or just "therapy") to treat mental disorders. Some psychologists specialize in psychological testing and evaluation., adult psychotherapistPyschotherapists are often called a 'therapists'. These professionals may be a psychiatrist, psychologist or other mental health professional who have specialist training in psychotherapy. They are qualified to work with patients in a clinical setting., trained family therapistPyschotherapists are often called a 'therapists'. These professionals may be a psychiatrist, psychologist or other mental health professional who have specialist training in psychotherapy. They are qualified to work with patients in a clinical setting. and researcher, he is Emeritus Professor of Psychopathology of Chronic Traumatization at the Department of Clinical and Health Psychology at Utrecht University, the Netherlands, and, until January 1, 2013, a psychologist/ psychotherapist at the Sinai Center for Mental Health, Amstelveen. He is clinical consultant of the Center for Post-Trauma Therapy and Trauma Eduction, Helsinki and Oulu, Finland. He was Chief of Research at the Cats-Polm Institute—a research institute in the area of childhood abuse"interactions in which one person behaves in a violent, demeaning or invasive manner towards another person (e.g. child or partner)" and neglect—in Zeist and a lead psychotherapist, specialized in the treatment of clients with complex trauma-related disorders, at the Mental Health Center Buitenamstel in Amsterdam.

He has been on the Editorial Board of a number of scientific journals, and he has published several books in the area of trauma and dissociation, loss, and bereavement, and over 100 articles in peer-reviewed scientific journals (several of which can be found at this website). Onno van der Hart is a Past-President of the International Society for Traumatic Stress Studies (ISTSS), a former Vice-President and Fellow of the International Society for the Study of DissociationDissociation is a compartmentalization of experience, where elements of a trauma are not integrated into a unified sense of the self. {{Rp|4-810, 127}}The lay persons idea of [[dissociation]], that which exists in the normal mind, is not what is referred to in this document. {{Rp|233-234}} and Fellow of the American Society of Clinical Hypnosis (ASCH). He is a scholar in Pierre Janet studies.

Prof. Van der Hart has worked with colleagues Ellert Nijenhuis, PhD, and Kathy Steele, MN, CS, on a theoretical approach on trauma-related dissociation of the personality and treatment model which unifies psychiatric disorders with a traumatic stress origin. Their combined efforts resulted, among other things, in the publication of their book, The Haunted SelfThe DSM-IV uses the term identity in its definition of dissociation. (see identity) {{Rp|127}}: Structural DissociationStructural dissociation (SD) is one of the three accepted etiological ideas for the etiology of dissociative identity disorder. {{Rp|158-165}} It also explains other specified dissociative disorder, dissociative forms of borderline personality disorder, and dissociative posttraumatic stress disorder {{See also| Structural dissociation}}Structural dissociation of the personality is a theory that describes the effect of trauma on the personality. It applies to PTSD, complex PTSD, other specified dissociative disorder and dissociative identity disorder. and the Treatment of Chronic Traumatization (New York/London: W.W. Norton & Cie, 2006), for which they received the Media Award of the International Society for the Study of Trauma and Dissociation. A more recent, related publication is the book Coping with Trauma-related Dissociation: Skills Training for and Therapists, by Suzette Boon, Kathy Steele and Onno van der Hart (New York/London: W. W. Norton & Co), for which the authors received the 2011 Pierre Janet Writing Award of the International Society for the Study of Trauma and Dissociation.

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