Sigmund Freud was an Austrian psychologist born in 1856 who founded the psychoanalytic school of psychology. He is known for developing psychoanalysis, a clinical method for treating psychopathology through dialogue between a patient and analyst to uncover unconscious desires and repressed memories. Freud theorized that the mind contains three elements - the conscious, preconscious, and unconscious. The unconscious contains drives and instincts not readily accessible to awareness that influence behavior.