Mass interest in the issue of peer victimization arose during the 1990s due to media coverage of student suicides, peer beatings, and school shootings, notably the tragedy in Columbine, Colorado. This led to an explosion of research attempting to assess bully-victim relationships and related players, what leads victims to experience negative outcomes and how widespread this problem was. Studies of peer victimization have also been conducted in the context of research investigating childhood relationships in general and how they are associated with school adjustment and achievement.