Why do Bullies Bully?
A collection of 153 studies on bullying were analyzed. The results identified eight main factors of bullying.
They found that bullies often:








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References:
Cook, C.R., Williams, K.R., Guerra, N.G., Kim, T.E., & Sadek, S. (2010).Predictors of Bullying and Victimization in Childhood and Adolescence: A Meta-analytic Investigation. School Psychology Quarterly, 25(2), 65-83.
http://www.olweus.org/public/bullying.page