Research conducted by the Australian Institute of Family Studies followed the progress of 178 children identified at 11 or 12 years of age as displaying three or more of such characteristics as “high aggression, low co - operativeness, low self - control, low capacity to stay focused on tasks, high hyperactivity and a volatile or moody temperament. ”
يجيب التقرير :‏ « ان الاولاد الذين صاروا مراهقين سعداء هم الذين لم يستمروا في معاشرة نظرائهم المتمردين ،‏ والذين يُرجَّح ان والديهم اشرفوا عليهم عن كثب » .‏