The strength of this study is that it uses variety of information to give accurate detail such as the annual assessments of bullying over the five phases of time during childhood, the uses of clinical interviews with parents in examining diagnostic status with the child, and the data on early parent child support autonomy based on observations between parents and children's. The study was reliable where parents and children were videotaped in the laboratory, different researchers made conclusions, teachers were changed every year who rated levels of bullying in order to decrease bias. The use of HLM was beneficial in this study where it estimated the changes in the risk of bullying as time passed by. The study had limitation where there were
