Julian Leopold Ochorowicz (1850–1917) was a psychologist, philosopher, and inventor, as well as a photographer, journalist, and poet. As a positivist, he postulated strict research methods in science and treated psychology as a field of study to which the tools of natural sciences can be applied. Ochorowicz's interest in occult phenomena, which for him were not supernatural but just unexplained and misinterpreted qualities of the human body and mind, in time grew to be the most intriguing topic of his work. Ochorowicz wanted to experimentally examine medium-related and other occult phenomena, which he associated with hypnotic states. He used the term “ideoplasty” for a class of phenomena that he deemed theoretically possible, whereby psychic energy is transformed into material excretions. Ideoplasty was a part of his wider conception of transformations of energy (e.g., of power into motion), which combined his theoretical attitude in psychology and his technical inventions.

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