The long-term effect of two parent training programs for conduct problem preschoolers is reported. Families of 54 behaviorally disturbed preschool-aged children were randomly assigned to 1 of 3 treatment conditions: standard Parent-Child Interaction Therapy (STD), an abbreviated form of PCIT (ABB), and a no-treatment waitlist control group (WL). Of the families who completed treatment (STD and ABB), data were collected on 97% and 94% of families at 1- and 2-year follow-up, respectively. Follow-up assessment of parent report and independent observations indicated that treatment gains were largely maintained for both treatment conditions with little difference between the two treatments. The findings suggest that an abbreviated form of PCIT has long-term benefits for families with young children displaying early conduct problems.