Sanders G, Ross-Field L
Brain Cogn. 1986 Jul;5(3):280-90. doi: 10.1016/0278-2626(86)90032-1.
On the basis of a literature review it was concluded that sex differences in cognitive ability and the etiology of male homosexuality may have a common biological base, leading to the prediction that in terms of cognitive ability homosexual males (HmM) would resemble heterosexual females (HtF) rather than heterosexual males (HtM). This prediction was investigated using visuo-spatial tasks on which males are known to perform better than females. In Experiment 1 HtM performed better on a water level task than HmM and HtF whose performances did not differ significantly. A different version of the water level task and the Vincent Mechanical Diagrams Test were used in Experiment 2; on both tasks the HtM performed better than the HmM and the HtF whose performance did not differ significantly. The results are interpreted as support for a common biological determinant of cognitive ability and male sexual orientation.
基于文献综述得出的结论是，认知能力方面的性别差异以及男性同性恋的病因可能有共同的生物学基础，由此预测，在认知能力方面，男同性恋者（HmM）与异性恋女性（HtF）相似，而不是与异性恋男性（HtM）相似。使用已知男性比女性表现更好的视觉空间任务对这一预测进行了研究。在实验1中，异性恋男性（HtM）在水位任务上的表现优于男同性恋者（HmM）和异性恋女性（HtF），后两者的表现没有显著差异。实验2使用了水位任务的不同版本和文森特机械图形测试；在这两项任务中，异性恋男性（HtM）的表现均优于男同性恋者（HmM），而异性恋女性（HtF）的表现没有显著差异。这些结果被解释为支持认知能力和男性性取向存在共同生物学决定因素的观点。
