The development of bullying.

Over the past 25 years, concern has been growing for children's bullying. We now recognize that bullying is wrong and hurtful. Research has fuelled a growing understanding that persistent bullying may be an indication of significant psycho-social problems. In this paper, we describe our longitudinal research on the development of bullying, examine risk factors associated with diverse pathways of bullying, and consider intervention strategies to address problems among children and youth who bully.