Abstract
Penile volume and galvanic skin responses to female and male nude film sequences were studied in 24 transsexual patients, patients requesting treatment for homosexual impulses and 60 hetersexual students. Transsexual patients were found to differ significantly from homosexuals in their tendency to show more positive penile volume responses to males than to females. Student controls and homosexuals showed significantly greater galvanic skin responses to the preferred than to the non-preferred sex. Transsexuals tended to show larger galvanic skin responses to females than to males. No strong relationships were found between penile volume and galvanic skin responses to the preferred sex.