Saturday, May 19, 2012

Gender nonconformity and homosexuality

In the comments of an earlier post, someone wrote that there is very little relationship between masculine or feminine behavior and sexual orientation. From a 2003 review:
There are two main correlates of sexual orientation that point to an early developmental genesis. The first is the relationship between childhood gender nonconformity and adult sexual orientation (Bailey and Zucker 1995), which is generally considered one of the strongest of all developmental associations in humans (Bem, 1996). Homosexual men typically recall having been feminine boys, whilst homosexual females were masculine girls. Prospective work confirms this relationship for men (Green, 1987; Zucker and Bailey, 1995). In their meta-analysis, Bailey and Zucker (1995) report large effect sizes for the degree of this association (d=1.31 for men, d=0.96 for women). The gender nonconforming behaviours appear to be specific to childhood sex-typed activities and interests, rather than playmate preferences. Given evidence for an early formative role for androgens in the development of such behaviours, these data are consistent with neurohormonal differentiation theory (Berenbaum and Hines, 1992; Berenbaum and Snyder, 1995). These large heterosexual–homosexual differences in childhood sex atypicality also extend to adulthood, when assessed by “gender-diagnosticity” measures (the extent of male versus female typicality of interests). On these measures (as well as on traditional masculinity–femininity scales; Haslam 1997) gay men are typically more feminine and lesbian women more masculine in adulthood than their same-sex heterosexual peers (Lippa, 2000; Lippa and Arad, 1997).

Black-white differences in glaucoma

Glaucoma is a progressive condition caused by a combination of genetic and environmental factors and is the leading cause of irreversible bl...