"Relational aggression" refers to harm within relationships caused by covert bullying or manipulative behavior. Examples include isolating a youth from his or her group of friends (social exclusion), threatening to stop talking to a friend (the silent treatment), or spreading gossip and rumors by email. This type of bullying tends to be…

Previous research has demonstrated that informant disagreement is common with the use of rating scales to assess problem behavior in school-age populations. However, much less is known about this phenomenon in preschool populations. This is important because the accurate assessment of problem behavior in preschool is complex due to the rapid…