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psychoanalysis, method of treating mental disorders, shaped by psychoanalytic theory, which emphasizes unconscious mental processes and is sometimes described as “depth psychology.” The psychoanalytic movement originated in the clinical observations and formulations of Austrian psychiatrist Sigmund Freud, who coined the term psychoanalysis. During the 1890s, Freud worked with Austrian physician and physiologist Josef Breuer in studies of neurotic patients under hypnosis. Freud and Breuer observed that, when the sources of patients’ ideas and impulses were...