- 1857 – Alfred Binet, French psychologist and graphologist (d. 1911).
- 1921 – John Money, New Zealand psychologist and sexologist, known for his research on gender identity, and responsible for controversial involuntary sex reassignment of David Reimer (d. 2006).
- 1926 – Elisabeth Kübler-Ross, Swiss-American psychiatrist and author (d. 2004).
- 1939 – Havelock Ellis, English psychologist and author (b. 1859).
Alfred Binet (08 July 1857 to 18 October 1911), born Alfredo Binetti, was a French psychologist who invented the first practical IQ test, the Binet–Simon test.
In 1904, the French Ministry of Education asked psychologist Alfred Binet to devise a method that would determine which students did not learn effectively from regular classroom instruction so they could be given remedial work. Along with his collaborator Théodore Simon, Binet published revisions of his test in 1908 and 1911, the last of which appeared just before his death.
John William Money (08 July 1921 to 07 July 2006) was a New Zealand psychologist, sexologist and author known for his research into sexual identity and biology of gender.
He was controversial for his conduct towards vulnerable patients. He was one of the first researchers to publish theories on the influence of societal constructs of gender on individual formation of gender identity. Money introduced the terms gender identity, gender role and sexual orientation and popularised the term paraphilia. He spent a considerable amount of his career in the United States.
A 1997 academic study criticized Money’s work in many respects, particularly in regard to the involuntary sex-reassignment of the child David Reimer.
Money’s writing has been translated into many languages and includes around 2,000 articles, books, chapters and reviews. He received around 65 honours, awards and degrees in his lifetime. He was also a patron of many famous New Zealand artists, such as Rita Angus and Theo Schoon.
Elisabeth Kübler-Ross (08 July 1926 to 24 August 2004) was a Swiss-American psychiatrist, a pioneer in near-death studies, and author of the internationally best-selling book, On Death and Dying (1969), where she first discussed her theory of the five stages of grief, also known as the “Kübler-Ross model”.
Kübler-Ross was a 2007 inductee into the National Women’s Hall of Fame, was named by Time as one of the “100 Most Important Thinkers” of the 20th century and was the recipient of nineteen honorary degrees. By July 1982, Kübler-Ross taught 125,000 students in death and dying courses in colleges, seminaries, medical schools, hospitals, and social-work institutions. In 1970, she delivered an Ingersoll Lecture at Harvard University on the theme On Death and Dying.
Henry Havelock Ellis (02 February 1859 to 08 July 1939) was an English physician, eugenicist, writer, progressive intellectual and social reformer who studied human sexuality. He co-wrote the first medical textbook in English on homosexuality in 1897, and also published works on a variety of sexual practices and inclinations, as well as on transgender psychology. He is credited with introducing the notions of narcissism and autoeroticism, later adopted by psychoanalysis.
Ellis was among the pioneering investigators of psychedelic drugs and the author of one of the first written reports to the public about an experience with mescaline, which he conducted on himself in 1896. He supported eugenics and served as one of 16 vice-presidents of the Eugenics Society from 1909 to 1912.