“…There exist many epidemiological studies of psychiatric disorders in children in the U.K. (for example, Rutter & Graham, 1966;Rutter, Tizard & Whitmore, 1970;Rutter, Graham, Chadwick & Yule, 1976;Graham & Rutter, 1973;Macmillan, Kolvin, Garside, Nicol & Leitch, 1980), Norway (Vikan, 1985), Uganda (Minde, 1975) and the U.S.A. (Achenbach & Edelbrock, 1979), but very few studies have been carried out in Japan. Some studies which used police records for information do exist, but fmdings obtained in this way are very limited (Educational Ministry, 1982).…”