Parent reported behavioral difficulties in young children are relatively common. Without adequate intervention, some children will later present with more severe problem behaviors. Parent management training is one of the best methods of treatment for behavior problems; however, existing treatments can be lengthy and difficult to conduct outside of a research setting. The Brief Behavioral Intervention was designed as a briefer version of a manualized parent management training treatment package. Thirty-one parents of children aged 2-6.5 presenting with behavior problems were included in this initial study of treatment effectiveness. Based on parent and teacher report, treatment was effective in a mean of 7.2 sessions.