A few choice snippets:
Qazi Rahman and Glenn Wilson conducted a series of neurocognitive tests of spatial skill. They found that gay men performed less well than heterosexual men, but matched the ability of women.
But gay men performed better than heterosexuals and as well as women at remembering the locations of objects in an array.
In several language tests, traditionally a female strong point, gay men did as well as heterosexual women. Lesbians, on the other hand, performed the tests as poorly as “straight” men.
Dr Rahman said: “Because we know that performance on these cognitive tests depends on the integrity of specific brain regions, the differences implicate robust differences between the brains of homosexual and heterosexual men and women and suggest that hormonal factors early in development (probably during the 1st trimester of pregnancy) produce these differences.”
The researchers also found that gay men and lesbians both had longer ring fingers relative to their index fingers than heterosexual men and women.
Relatively long ring fingers are a sign of exposure to elevated levels of the male hormone testosterone in the womb.
The findings supported the idea that high, not low, testosterone levels in men produce shifts in sexual preference.