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bullying, intentional harm-doing or harassment that is directed toward vulnerable targets and typically repeated. Bullying encompasses a wide range of malicious aggressive behaviours, including physical violence, verbal mockery, threats, ostracism, and rumours spread either orally or by other means of communication, such as the Internet. One influential definition proposed by Norwegian researcher and psychologist Dan Olweus says: Given the damage a single incident can cause, however, some scholars question whether the behaviour must be repeated...