Depth psychology (from the German term Tiefenpsychologie) refers to the practice and research of the science of the unconscious, covering both psychoanalysis and psychology.[1] It is also defined as the psychological theory that explores the relationship between the conscious and the unconscious, as well as the patterns and dynamics of motivation and the mind.[2] The theories of Sigmund Freud, Carl Gustav Jung, and Alfred Adler are all considered its foundations.[3]