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Sigmund Freud, the father of psychoanalysis, ranked third in the 1982 survey of influential psychotherapists. This survey, conducted by the American Psychological Association, sought to identify the most influential figures in the field of psychotherapy. Freud's enduring influence is attributed to his groundbreaking theories on the unconscious mind, dream analysis, and the development of personality. His work continues to shape the understanding and treatment of mental health conditions.