Depth psychology refers to psychological studies or methods which focus on the unconscious. This term was coined by Eugen Bleuler, a psychiatry professor at the University of Zurich, in 1914 to pertain to psychoanalytic approaches. It views the psyche as having conscious, semi-conscious, and unconscious parts and that uncovering the underlying motives is intrinsically therapeutic. Depth psychology has been founded on the works of Sigmund Freud, Carl Jung, Alfred Adler, and Otto Rank.