When the medical faculty took up hypnotism, about 1880, Bernheim was very enthusiastic, and soon became one of the leaders of the investigation. He became a well-known authority in this new field of medicine. Albert Moll, an active promoter of hypnotism in Germany, went to Nancy and studied with Bernheim; while in the United StatesBoris Sidis and Morton Prince were also considered part of the Nancy School. Bernheim also had a significant influence on Sigmund Freud, who had visited Bernheim in 1889, and witnessed some of his experiments. Freud had already translated Bernheim's On Suggestion and its Applications to Therapy in 1888; and later described how "I was a spectator of Bernheim's astonishing experiments upon his hospital patients, and I received the profoundest impression of the possibility that there could be powerful mental processes which nevertheless remained hidden from the consciousness of man". He would later term himself a pupil of Bernheim, and it was out of his practice of Bernheim's suggestion/hypnosis that psychoanalysis would evolve. Bernheim himself increasingly turned from hypnosis to the use of suggestion in a waking state. In 1886, he adopted Hack Tuke's term 'psycho-therapeutic action' and in 1891 he used the term 'psychotherapy' in the title of book as a synonym for his suggestive therapeutics.
One of the earliest accounts of a false memory which was induced by a therapist comes from Bernheim in the 1880s. Bernheim suggested to his patient Marie that she had witnessed an old bachelor rape a young girl. After the session, Bernheim said: "it is not a dream; it is not a vision I have given you during your hypnotic sleep; it is the truth itself; and if inquiry is made into this crime later on, you will tell the truth". One of Bernheim's friends asked Marie about the event three days later, and she gave a perfect recollection of the alleged event, including the name of the rapist and his victim, as well as the date, time, and place of the crime. Bernheim then tested Marie's confidence in her testimony by asking if it was not perhaps a "vision like those was in the habit of giving her during her sleep", but Marie remained adamant of the veracity of the story. Marie even agreed to testify at a trial, under oath.
Criticism
Bernheim has been criticised for failing to recognise the role of what Pierre Janet called the rapport between hypnotizer and hypnotised - the element from which Freud would evolve the concept of transference.
Works
Bernheim wrote many works, of which the following are mentioned here:
"Des Fièvres Typhiques en Général", Strasburg, 1868;