International Society for the Study of Trauma and Dissociation

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The International Society for the Study of Trauma and Dissociation (ISSTD) is a nonprofit professional organization of health professionals and individuals who are interested in advancing the scientific and societal understandings of trauma-based disorders, including posttraumatic stress disorder, complex posttraumatic stress disorder, and the dissociative disorders.

While serving as a platform for discussion and understanding of these topics, the ISSTD has also attracted attention and criticism regarding its promotion of controversial treatments and conspiracy theories, such as discredited theories of government mind control related to hypnosis and unsubstantiated claims of satanic ritual abuse.