The Canadian “Fruit Machine” (Stress Response Test Apparatus) was a 1950s attempt to scientifically detect homosexuality in men serving in Canadian civil posts, the RCMP (Royal Canadian Mounted Police) and Canadian Army. The machine was a simple dentist-type chair in which the suspected sat in comfort, eyes glued to an attached wired black box fitted over the eyes that showed images ranging from the mundane to erotic porn (hetero and homo). Sensors were attached to the body to determine perspiration rate, heart rate, (and in some versions) erectile occurrence! The machine monitored pupil dilation as well. When pupillary response in millimeters over a certain limit was combined with high perspiration rate, high heart rate, and sometimes producing an erection over male pornography the subject was thought to be a “Fruit” (homosexual) and was either coerced out of duty or expelled. 10,000 men lost their positions based on this bizarre apparatus and although de-funded in the 1960s was still being used in the 1970s!!!

Special "Queer Scouts" were inserted into positions to look for possible homosexual deviants as candidates for the SRTA.