The aim of this study was to examine the intellectual characteristics of the abused children who were under the protection of the child guidance center. The subjects were 127 children who had a previous history of physical abuse, sexual abuse, emotional abuse, and neglect. Their intelligences were measured by the use of the Wechsler Intelligence Scale for Children-III (WISC・III), the Tanaka-Binet Intelligence Scale or the Kyoto Scale of Psychological Development 2001. It was found that the mean psychometric intelligence (PI) of all the subjects was 78.98 (SD= 18.03). In comparison with the standard mean PI (100) and the mental retardation criteria PI (70), it was suggested that the mean PI of the abused children were at the borderline level. Examination on the basis of quantification theory I showed that the neglected children had lower PI in terms of their intellectual development than the other types of the abused children, and that the PI of the abused children in the protection in child welfare institutions had higher than that of the abused children in their houses. It was also suggested that factors such as types of abuse, children's sex, and their place of care had no significant effects on the discrepancy between verbal and performance PI of abused children.
