 The purpose of this research is to evaluate and compare the effectiveness of two parenting programs in reducing the ADHD symptoms and behavioral problems of preschool children with ADHD through a controlled study. One program is a home-based parent training intervention that is designed to enhance the parent-child interaction, constructive parenting skills, and the childs tolerance for delay. The other intervention is a clinic-based parent training program that focuses on reducing noncompliance in preschool children and improving parenting skills. 