心理学把攻击行为定义为旨在导致他人身体上或心理上的痛苦的有意伤害行为。研究证明,婴幼儿期是攻击性行为发生的一个高峰期,且具有中等程度的稳定性:在童年被同伴评定为攻击型的男孩到成年期倾向于有更多的犯 Psychology defines aggression as a deliberate harm that aims to cause physical or psychological distress to others. Studies have shown that infancy is a peak of aggressive behavior and has moderate stability: in childhood, aggressive boys are rated as aggressive boys by adulthood and tend to have more offenders in adulthood