This study was performed to investigate the prevalence of abnormal behavior, ada-ptability and intelligence of child and adolescents and the usefulness of KAS(Korean Attitude System) as a screening method to detect the psychopathology of child and adolescents.

478 child and adolescents were completed the instruments of KAS that focused on development of behavior, adaptability and intelligence at the children's medical examination center.

The most influenced subcategories to the disturbance of behavior of the subjects were leadership, cooperation, and emotion (in order). The preference of adaptability was high in the fields of literature, law, technology, medicine and sociology. The mean I.Q. of the subjects was high average and not different in both sex. The subjects with below average of I.Q. were three cases(0.6%) and the two of them were boderline and only one case was mild mental retardation. The total number of patients referred to the department of psychiatry was eight cases(1.7%) and revealed the disturbance of behavior, affect, and thought.

Finally the authors concluded that KAS test performed at the children's medical examination center was useful primary screening method to detect the psychopathology of child and adolescents.