On the Psychology and Pathology of So-Called Occult Phenomena

Carl Jung held an interest in occult phenomena from the start of his professional career.

After working as an assistant physician at the Burghölzli Hospital in Zürich, in 1902 he published his doctorate titled The Psychology and Pathology of So-Called Occult Phenomena.

In it, he describes various clinical cases of split consciousness, twilight states, and somnambulism, and presents the case of an adolescent medium whose séances he had attended in the 1890s.

Attempting to clinically account for the visions experienced by the young woman, he cites the theory of cryptomnesia, in which unrecognized memory images rise into consciousness.