She was born Evelyn Gentry and grew up with 8 brothers and sisters in the Colorado Plains. When she was 13, her family moved to Sterling, Colorado.
In 1924 she became a student at the University of Colorado while working as a maid for a rich Boulder family. Her mentor, Dr Karl Munzinger, guided her in her challenge of the then prevalent psychological theory of behaviourism. He invited her to write her own case history. After receiving her Masters degree, she became one of 11 women involved in the PhD program in psychology at Johns Hopkins University, Baltimore, Maryland, having been refused referral to Yale. She was awarded her PhD in 1932.
In 1937 Evelyn received a fellowship to go to Europe. She enrolled at the Berlin Institute of Psychotherapy. She witnessed mass hysteria on the triumphant return of Hitler to Berlin after the Anschluss.
In 1942 while a teacher at UCLA, Evelyn married writer Don Caldwell. She became close to one of her students, Sam From, who introduced her in 1943 to the gay and lesbian subculture of the time. He challenged her to scientifically study "people like him."
Despite the social, moral and scientific climate of the post-war period, Hooker became increasingly convinced that most gay men were perfectly socially adjusted and that this could be proven through scientific tests.
In 1948 she divorced her husband and moved to a guest cottage at the Salter Avenue home of Edward Hooker, professor of English at UCLA and poetry scholar. They married in London in 1951.
In the mid 50s Christopher Isherwood became their neighbour and they became friends.
Sam From died in a car accident in 1956, just before her ground-breaking research was published.
Hooker's husband died in January 1957 of a heart attack.
In 1961 Hooker was invited to lecture in Europe and in 1967, the director of the National Institute of Mental Health (NIMH) asked her to produce a report on what the institution should do about homosexual men.
Richard Nixon's election in 1969 delayed the publication of the report which was published by a magazine and without authorisation in 1970. The report recommended the decriminalisation of homosexuality and the provision of similar rights to both homosexual and heterosexual people. The burgeoning gay rights movement seized on this.
She retired from her research at the age of 63 and opened a private practice. Most of her clients were gay men and lesbians.
Although, since 1954, Hooker had collected data about her homosexual friends, she felt this was of little value because of the lack of scientific rigor attached to the gathering of this data. She applied for a grant from the NIMH which she received.
She gathered two groups of men: one group would be exclusively homosexual, the other exclusively heterosexual. She contacted the Mattachine Society to find homosexual men. She had greater difficulty finding heterosexual men. She also had to use her home to conduct the interview to protect people's anonymity.
After a year of work, Hooker presented a team of 3 expert evaluators with 60 unmarked psychological profiles. She decided to leave the interpretation of her results to other people so as to avoid her own prejudice.
First, she contacted Bruno Klopfer, an expert on Rorschach tests to see if he would be able to identify the sexual orientation of people through their results at those tests. He couldn't.
Then Edwin Schneidman, creator of the MAPS test, also analyzed the 60 profiles. It took him six months and he too found that both groups were highly similar in their psychological make-up.
The third expert was Dr Mortimer Mayer who was so certain he would be able to tell the two groups apart that he went through the process twice.
The three evaluators agreed that in terms of adjustment, there were no differences between the members of each group.
In 1956 Hooker presented the results of her research in a paper delivered to the American Psychological Association's convention in Chicago.
Hooker was the first social scientist to do research and write on the gay community.
Her studies contributed to a change in the attitudes of the psychological community towards homosexuality and to the American Psychiatric Association's decision to remove homosexuality from its handbook of disorders in 1973. This in turn helped change the attitude of society at large.
- Evelyn Hooker, "The adjustment of the male overt homosexual", Journal of projective techniques, XXI 1957, pp. 18–31.
- Evelyn Hooker, "The homosexual community". Proceedings of the XIV International congress of applied psychology, Munksgaard, Copenhagen 1961.
- Evelyn Hooker, "Homosexuality: Summary of studies". In E. M. Duvall & S. M. Duvall (curr.), Sex ways in fact and faith, Association Press, New York 1961.
- Evelyn Hooker, "Male homosexual life styles and venereal disease". In: Proceedings of the World forum on syphilis and other treponematoses (Public Health Service Publication No. 997), U.S. Government Printing Office, Washington, DC 1962.
- Evelyn Hooker, "Male homosexuality". In: N. L. Farberow (cur.), Taboo topics, Atherton, New York 1963, pp. 44–55.
- Evelyn Hooker, "An empirical study of some relations between sexual patterns and gender identity in male homosexuals". In J. Money (cur.), Sex research: new development, Holt, Rinehart & Winston, New York 1965, pp. 24–52.
- Evelyn Hooker, "Male homosexuals and their worlds". In: Judd Marmor (cur.), Sexual inversion: the multiple roots of homosexuality, Basic Books, New York 1965, pp. 83–107). Traduzione italiana in: Judd Marmor, Inversione sessuale.
- Evelyn Hooker, "Homosexuality". In: The international encyclopedia of the social sciences, MacMillan and Free Press, New York 1968.
- Evelyn Hooker, "Parental relations and male homosexuality in patient and non-patient samples", Journal of consulting and clinical psychology, XXXIII 1969, pp. 140–142.
- Changing Our Minds: The Story of Dr. Evelyn Hooker at the Internet Movie Database
- Defending the deviates. Evelyn Hooker documentary Changing our minds on video. A review of the above documentary
- Her entry at QueerTheory.comde:Evelyn Hooker