- 1911 – Heinz Lehmann, German-Canadian psychiatrist and academic (d. 1999).
- 1923 – Jeanne Block, American psychologist (d. 1981).
- 1991 – John Patrick Spiegel, American psychiatrist and academic (b. 1911).
Heinz Edgar Lehmann OC FRSC (17 July 1911 to 07 April 1999) was a German-born Canadian psychiatrist best known for his use of chlorpromazine for the treatment of schizophrenia in 1950s and “truly the father of modern psychopharmacology.”
In 1973, he was a member of the Nomenclature Committee of the American Psychiatric Association that decided to drop homosexuality from the Diagnostic and Statistical Manual of Mental Disorders (DSM), i.e. to depathologise it.
Jeanne Lavonne Humphrey Block (17 July 1923 to 04 December 1981) was an American psychologist and expert on child development.
She conducted research into sex-role socialisation and, with her husband Jack Block, created a person-centred personality framework. Block was a fellow of the American Association for the Advancement of Science and conducted her research with the National Institute of Mental Health and the University of California, Berkeley. She was an active researcher when she was diagnosed with cancer in 1981.
John Patrick Spiegel
John Paul Spiegel (17 March 1911 to 17 July 1991) was an American psychiatrist, and expert on violence and combat stress and the 103rd President of the American Psychiatric Association (APA).
As president-elect of the APA in 1973, he helped to change the definition of homosexuality in the DSM which had previously described homosexuality as sexual deviance and that homosexuals were pathological.