Preadolescent boys with Gender Identity Disorder (N = 13), their brothers (N = 8) and boys referred for psychiatric assessment (N = 10) were administered age-appropriate Wechsler intelligence scales. Four hypotheses regarding patterns of intellectual functioning and spatial ability were tested. A previous suggestion that the development of boyhood femininity is associated with higher than average IQ was not supported, since the IQs of the feminine boys and their brothers did not differ. A report of enhanced verbal ability as compared with perceptual organization also was not replicated in these feminine boys. On Kaufman's “Freedom from Distractibility” factor, the feminine boys and their brothers obtained scores as low as the psychiatric controls; that is, all three groups were equally distractible. It was suggested that anxiety contributed to poor performance on this factor. Unlike the control groups, the feminine boys obtained low scores on a test of spatial ability (Block Design) as compared to their scores on a verbal task (Vocabulary). The association between a feminine gender role and relatively poor spatial ability was discussed.
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