The effectiveness of a parenting program was examined with an Australian sample regarding improved parent knowledge, parental sense of competence, and child behavior. One hundred and sixteen parents and their children were randomly assigned to three conditions: a two-session group based intervention, a two-session self-administered individual intervention, or to a waitlist control group. Across both treatment modalities results reveal a significant increase in parental satisfaction, efficacy, and a reduction in child problem behavior. Improvements were maintained at 3-months follow-up. Results indicate the individual self-administered format enhanced treatment gains relative to the group format. (Contains 5 tables.)