children and their mothers. Thus, because mothers might not be aware of all of their children’s exposure to bullying, we tested the association between the 12 year old children’s own reports of bullying victimisation and their self harm outcomes. However, because in theory children who self harm might give exaggerated reports of their exposure to bullying as a result of co-morbid psychological difficulties, we also tested the association between mothers’ reports of bullying victimisation and children’s self harm outcomes. Fourthly, our longitudinal design allowed us to establish temporal ordering by testing the association between mothers’ prospective reports of bullying victimisation up to the age 10 assessment and children’s self harm outcomes at the age 12 assessment.
