An individual's age at intervention is a strong predictor of the effectiveness of a given treatment. The specific kinds of anti-social behaviours exhibited, as well as the magnitude of those behaviours also impact how effective a treatment is for an individual. Behavioural parent training (BPT) is more effective to preschool or elementary school-aged children, and cognitive behavioural therapy (CBT) has higher effectiveness for adolescents. Moreover, early intervention of anti-social behaviour is relatively more promising. For preschool children, family is the main consideration for the context of intervention and treatment. The interaction between children and parents or caregivers, parenting skills, social support, and socioeconomic status would be the factors. For school-aged children, the school context also needs to be considered. The collaboration amongst parents, teachers, and school psychologists are usually recommended to help children develop the ability of resolving conflicts, managing their anger, developing positive interactions with other students, and learning pro-social behaviours within both home and school settings.