Firestone P, Bradford J M, Greenberg D M, Nunes K L
Department of Psychiatry, University of Ottawa, Canada.
Am J Psychiatry. 2000 Nov;157(11):1847-50. doi: 10.1176/appi.ajp.157.11.1847.
The purpose of this study was to examine the ability of phallometry to discriminate among homicidal child molesters, nonhomicidal child molesters, and a comparison group of nonoffenders.
Twenty-seven child molesters who had committed or had attempted a sexually motivated homicide, 189 nonhomicidal child molesters, and 47 nonoffenders were compared on demographic variables and psychometrically determined responses to aural descriptions of sexual vignettes. Two phallometric indexes were used: the pedophile index and the pedophile assault index. The pedophile index was computed by dividing the subject's highest response to an aural description of sex with a "consenting" child by his highest response to description of sex with a consenting adult. The pedophile assault index was computed by dividing the subject's highest response to an aural description of assault involving a child victim by his highest response to description of sex with a "consenting" child.
Homicidal child molesters, nonhomicidal child molesters, and nonoffenders were not significantly different in age or IQ. Homicidal and nonhomicidal child molesters had significantly higher pedophile index scores than nonoffenders. Significantly more homicidal child molesters (14 [52%] of 27) and nonhomicidal child molesters (82 [46%] of 180) than nonoffenders (13 [28%] of 47) had pedophile index scores equal to or greater than 1.0, but homicidal and nonhomicidal child molesters did not differ from each other. Significantly more homicidal child molesters (17 [63%] of 27) than either nonhomicidal child molesters (71 [40%] of 178) or nonoffenders (17 [36%] of 47) had pedophile assault index scores equal to or greater than 1.0, and nonhomicidal child molesters and nonoffenders were not significantly different from each other. Within-group analyses revealed that of the three groups, only the nonhomicidal child molesters exhibited a significant difference between their pedophile index scores and their pedophile assault index scores; their pedophile index scores were higher.
Consistent with past research, the authors found that the pedophile index is useful in differentiating homicidal and nonhomicidal child molesters from nonoffenders and that the pedophile assault index is able to differentiate homicidal child molesters from nonhomicidal child molesters and nonoffenders.
本研究旨在检验阴茎测量法区分杀人恋童癖者、非杀人恋童癖者以及非犯罪对照群体的能力。
比较了27名实施或企图实施性动机杀人行为的恋童癖者、189名非杀人恋童癖者和47名非犯罪者在人口统计学变量以及对性场景听觉描述的心理测量确定反应方面的情况。使用了两种阴茎测量指标：恋童癖指数和恋童癖攻击指数。恋童癖指数的计算方法是，将受试者对与“同意”儿童发生性行为的听觉描述的最高反应除以其对与同意的成年人发生性行为描述的最高反应。恋童癖攻击指数的计算方法是，将受试者对涉及儿童受害者的攻击听觉描述的最高反应除以其对与“同意”儿童发生性行为描述的最高反应。
杀人恋童癖者、非杀人恋童癖者和非犯罪者在年龄或智商方面没有显著差异。杀人恋童癖者和非杀人恋童癖者的恋童癖指数得分显著高于非犯罪者。与非犯罪者（共47人，其中13人[28%]）相比，有更多的杀人恋童癖者（共27人，其中14人[52%]）和非杀人恋童癖者（共180人，其中82人[46%]）的恋童癖指数得分等于或大于1.0，但杀人恋童癖者和非杀人恋童癖者之间没有差异。与非杀人恋童癖者（共178人，其中71人[40%]）或非犯罪者（共47人，其中17人[36%]）相比，有更多的杀人恋童癖者（共27人，其中17人[63%]）的恋童癖攻击指数得分等于或大于1.0，且非杀人恋童癖者和非犯罪者之间没有显著差异。组内分析显示，在这三组中，只有非杀人恋童癖者的恋童癖指数得分和恋童癖攻击指数得分之间存在显著差异；他们的恋童癖指数得分更高。
与过去的研究一致，作者发现恋童癖指数有助于区分杀人恋童癖者和非杀人恋童癖者与非犯罪者，并且恋童癖攻击指数能够区分杀人恋童癖者与非杀人恋童癖者和非犯罪者。
