Healing Homosexuality: Case Stories of Reparative Therapy

Joseph Nicolosi didn't practice psychology, but rather pseudoscience.

https://en.wikipedia.org/wiki/Joseph_Nicolosi

‘In 2013, Nicolosi appeared in Stephen Fry's television documentary Stephen Fry: Out There, which examined different attitudes to homosexuality. Nicolosi informed Fry that “sixty percent of our clients now are teenagers. Parents call up in a panic because they found out their son is looking at gay porn, and, of course we have to get him into therapy”. After the segment, Fry says that “for all his talk of success, Nicolosi is unable to find one of his ex-gays to talk to us”. Fry then speaks with Daniel Gonzales, a former client of Nicolosi's who did not have success in changing his sexual orientation. Gonzales condemns the therapy.'

‘Like all forms of conversion therapy, reparative therapy is pseudoscientific, based on faulty assumptions, opposed by mainstream medical and psychological practitioners, and potentially harmful to patients. Some states have enacted laws against conversion therapy.'