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Dissociative disorders are psychological disturbances that affect the organization of identity, memory, perception, and/or consciousness in individuals. As originally described by French psychopathologist Pierre Janet in the late 1800s and early 1900s, dissociation may be best understood as a disorganization of mental processes when events that are normally linked logically and temporally are isolated from other mental processes that would normally be working together. The study of these phenomena led to Sigmund Freud’s theory of the subconscious and Janet’s theory of dissociation, and these models are still used today to explain dissociative phenomena. The term dissociative disorder was introduced in 1980 when the third edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III) abandoned the term hysteria in favor of separate categories ...

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