Blanchard R
Arch Sex Behav. 1985 Jun;14(3):247-61. doi: 10.1007/BF01542107.
This study tested a prediction derived from the hypothesis that asexual and bisexual transsexualism are actually subtypes of heterosexual transsexualism. Two questionnaire scales measuring erotic attraction to males and females were administered to 163 male-to-female transsexuals. A cluster analysis of their scores divided the subjects into four groups: heterosexual, homosexual, bisexual, and asexual. Fisher Exact tests were used to compare the frequency with which subjects in the four clusters reported a history of erotic arousal in association with cross-dressing. As predicted, there were no differences among the asexual, bisexual, and heterosexual transsexuals, and all three groups included a much higher proportion of fetishistic cases than the homosexual group (p less than or equal to .0001, two-tailed). These findings support the view that male transsexuals may be divided into two basic types: heterosexual and homosexual.
本研究对基于无性恋和双性恋易性癖实际上是异性恋易性癖亚型这一假设得出的预测进行了检验。对163名男变女易性癖者进行了两个测量对男性和女性性吸引力的问卷量表测试。对他们的分数进行聚类分析，将受试者分为四组：异性恋、同性恋、双性恋和无性恋。采用费舍尔精确检验来比较这四个聚类中的受试者报告与异装相关的性唤起历史的频率。正如预测的那样，无性恋、双性恋和异性恋易性癖者之间没有差异，并且这三组中恋物癖病例的比例都比同性恋组高得多（双侧检验，p小于或等于0.0001）。这些发现支持了男性易性癖者可分为两种基本类型：异性恋和同性恋的观点。
