 Participants in this open-label study will be randomly assigned to the Incredible Years training program or a waitlist condition, in which they will begin the program after a 1-year waiting period. Parent training sessions will take place once per week for 10 weeks, and will last approximately 2 hours each. Sessions will focus on teaching positive parenting skills, such as appropriate play and use of praise and rewards, as well as limit-setting techniques, such as ignoring, allowing children to experience the natural consequences of their actions, and assigning time-outs. Self-report assessments and phone interviews will be used to assess outcomes. Additionally, follow-up visits will occur immediately post-intervention and 6 and 12 months post-intervention. Children will attend one visit before the program begins, as well as the follow-ups held immediately post-intervention and 12 months post-intervention. These visits will include videotaped observations of children and their primary caregivers. 