McCormick C M, Witelson S F
Department of Psychology, McMaster University, Hamilton, Ontario, Canada.
Psychoneuroendocrinology. 1991;16(6):459-73. doi: 10.1016/0306-4530(91)90030-w.
Matched groups of homosexual men, heterosexual men, and heterosexual women (n = 38 per group) were tested on three measures of spatial ability and two measures of fluency that typically reveal sex differences. For the three spatial tests and one of the fluency tests, the mean performance of homosexual men fell between those of the heterosexual men and women. The pattern of cognitive skills of homosexual men was different from that of heterosexual men: homosexual men had lower spatial ability relative to fluency. The cognitive pattern of homosexual men was not significantly different from that of heterosexual women. In addition, the results suggest that homosexual men classified on the basis of hand preference may form two subgroups that differ in cognitive pattern. These findings are compatible with the hypothesis that there is a neurobiological factor related to sexual differentiation in the etiology of homosexuality.
对匹配的男同性恋者、异性恋男性和异性恋女性组（每组n = 38）进行了三项空间能力测试和两项通常显示性别差异的流畅性测试。在三项空间测试和一项流畅性测试中，男同性恋者的平均表现介于异性恋男性和女性之间。男同性恋者的认知技能模式与异性恋男性不同：相对于流畅性，男同性恋者的空间能力较低。男同性恋者的认知模式与异性恋女性没有显著差异。此外，结果表明，根据用手偏好分类的男同性恋者可能形成两个认知模式不同的亚组。这些发现与以下假设相符：在同性恋病因中存在与性别分化相关的神经生物学因素。
