The present study explored primary and middle school teachers′ definition of bullying and assessment of the severity of three types of bullying by using both questionnaires and interviews.

This study tested the social competence of different aggression/victims groups and the relations between the scores of friend and mutual-chosen friend and peer nominated like-most and like-least.

The studies on the result of bullying’s negative behavior go deeper and deeper.

According to the investigation on young children s bullying behavior in some kindergartens; the researcher not only analyzes the harm caused by children s such behavior but also gives his suggestions on how to remedy it.

The study surveyed 3061 adolescents aged from 11 to 18 years old in order to explore the possible factors by which could predict the victimization in school bullying.

A Study on the Classroom Bullying in Key High School and Its Intervention;

An anonymous investigation was conducted about school bullying, in which 481 pupils answered a self-designed questionnaire.

In the recent 20 years,many psychologists from different countries have worked hard on the problem of school bullying,but some mistakes and incongruence during the measure of bullying behaviors have inhibited researchers from understanding the real situation of bullying.

In order to explore the association of perceived school climate with school bullying, 918 junior middle school children from 13 middle schools in JiNan were surveyed.