How did Sigmund Freud develop the theory of psychoanalysis?

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Psychoanalytic theory: Sigmund Freud and Carl Jung lectures — psychoanalysis In July and September 1909 Austrian neurologist Sigmund Freud and Swiss psychologist and psychiatrist Carl Jung presented a series of lectures on psychoanalytic theory at Clark University in Worcester, Massachusetts. Shown in this September 10, 1909, photo are (from left in the front row) Sigmund Freud, G. Stanley Hall, and Carl Jung and (from left in the back row) Abraham A. Brill, Ernest Jones, and Sándor Ferenczi.

Sigmund Freud developed psychoanalysis through his clinical work and theoretical insights. Initially influenced by hypnosis, he later pioneered the technique of free association to uncover unconscious material. He theorized that repressed memories, often of a sexual nature, contribute to neurotic symptoms. Freud also introduced the structural model of the psyche, comprising the id, ego, and superego, and explored psychosexual development stages. His work emphasized the significance of early childhood experiences and the unconscious in shaping personality and behavior.12345