Experiment
Although Hooker had collected data about her homosexual friends since 1954, 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 for the study. She also had to use her home to conduct the interview to protect the participants' anonymity.
Hooker used three different psychological tests for her study: the TAT, the Make-a-Picture-Story test (MAPS test), and the Rorschach inkblot test.
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, to avoid any possible bias.
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. His ability to differentiate between the two groups was no better than chance.
Then Edwin Shneidman, 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 concluded 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 at the American Psychological Association's convention in Chicago.
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.
Read more about this topic: Evelyn Hooker
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