Sidney Marshall Jourard (1926–1974) was a Canadian psychologist remembered most for his book on the psychology of self-disclosure, The Transparent Self. He also wrote Healthy Personality: An Approach From the Viewpoint of Humanistic Psychology, which was a synthesis of the concepts and techniques that humanistic psychologists utilized and built upon in the 1960s and 70s. Jourard is also known for his "Self-Disclosure Theory" of humanistic therapy. He has written many other works, including essays, books, and lectures on growth as a human being.
In 1958, he was invited to work with the J. Hillis Miller Health Science Center at the University of Florida in Gainesville, working with the School of Nursing. He joined the Psychology Department in 1959, where he lectured and taught large sections of Introductory Psychology. He also had a private practice up until his death on December 2, 1974, in a freak automobile accident. Jourard was working on his small sports car in his garage at home when the jack slipped and brought about his accidental death.
Jourard's "Self-Disclosure Theory" is a therapeutic model of humanistic treatment where total disclosure was encouraged between the client and the therapist. The therapist would also disclose himself to the client to reciprocate; however, the therapist, being a psychologist, would rely on training and the concepts of psychological theories to relate to the client. According to Jourard, disclosure is important in any relationship, as it fosters openness, healthy relationships, and an enthusiasm to grow within the personal and social sphere.