stylistic:tone, linguistic:translation
Development of psychoanalysis

In October 1885, Freud went to Paris on a three-month fellowship to study with Jean-Martin Charcot, a renowned neurologist who was conducting scientific research into hypnosis. He was later to recall the experience of this stay as catalytic in turning him toward the practice of medical psychopathology and away from a less financially promising career in neurology research. Charcot specialized in the study of hysteria and susceptibility to hypnosis, which he frequently demonstrated with patients on stage in front of an audience.

Once he had set up in private practice in Vienna in 1886, Freud began using hypnosis in his clinical work. He adopted the approach of his friend and collaborator, Josef Breuer, in a type of hypnosis that was different from the French methods he had studied, in that it did not use suggestion. The treatment of one particular patient of Breuer's proved to be transformative for Freud's clinical practice. Described as Anna O., she was invited to talk about her symptoms while under hypnosis (she would coin the phrase " talking cure "). Her symptoms became reduced in severity as she retrieved memories of traumatic incidents associated with their onset.

The inconsistent results of Freud's early clinical work eventually led him to abandon hypnosis, having concluded that more consistent and effective symptom relief could be achieved by encouraging patients to talk freely, without censorship or inhibition, about whatever ideas or memories occurred to them. He called this procedure " free association ". In conjunction with this, Freud found that patients' dreams could be fruitfully analyzed to reveal the complex structuring of unconscious material and to demonstrate the psychic action of repression which, he had concluded, underlay symptom formation. By 1896 he was using the term " psychoanalysis " to refer to his new clinical method and the theories on which it was based.

Freud's development of these new theories took place during a period in which he experienced heart irregularities, disturbing dreams and periods of depression, a "neurasthenia" which he linked to the death of his father in 1896 and which prompted a "self-analysis" of his own dreams and memories of childhood. His explorations of his feelings of hostility to his father and rivalrous jealousy over his mother's affections led him to fundamentally revise his theory of the origin of the neuroses.

Based on his early clinical work, Freud postulated that unconscious memories of sexual molestation in early childhood were a necessary precondition for psychoneuroses (hysteria and obsessional neurosis), a formulation now known as Freud's seduction theory. In the light of his self-analysis, Freud abandoned the theory that every neurosis can be traced back to the effects of infantile sexual abuse, now arguing that infantile sexual scenarios still had a causative function, but it did not matter whether they were real or imagined and that in either case, they became pathogenic only when acting as repressed memories.

This transition from the theory of infantile sexual trauma as a general explanation of how all neuroses originate to one that presupposes autonomous infantile sexuality provided the basis for Freud's subsequent formulation of the theory of the Oedipus complex.

Freud described the evolution of his clinical method and set out his theory of the psychogenetic origins of hysteria, demonstrated in several case histories, in Studies on Hysteria published in 1895 (co-authored with Josef Breuer). In 1899, he published The Interpretation of Dreams in which, following a critical review of existing theory, Freud gives detailed interpretations of his own and his patients' dreams in terms of wish-fulfillments made subject to the repression and censorship of the "dream-work". He then sets out the theoretical model of mental structure (the unconscious, pre-conscious and conscious) on which this account is based. An abridged version, On Dreams, was published in 1901. In works that would win him a more general readership, Freud applied his theories outside the clinical setting in The Psychopathology of Everyday Life (1901) and Jokes and their Relation to the Unconscious (1905). In Three Essays on the Theory of Sexuality, published in 1905, Freud elaborates his theory of infantile sexuality, describing its "polymorphous perverse" forms and the functioning of the "drives", to which it gives rise, in the formation of sexual identity. The same year he published Fragment of an Analysis of a Case of Hysteria, which became one of his more famous and controversial case studies. Known as the 'Dora' case study, for Freud it was illustrative of hysteria as a symptom and contributed to his understanding of the importance of transference as a clinical phenomena. In other of his early case studies Freud set out to describe the symptomatology of obsessional neurosis in the case of the Rat man, and phobia in the case of Little Hans.