Evidence-based treatment of attention deficit/hyperactivity disorder in a preschool-age child: a case study.

This case study illustrates a behavioral treatment of "Peter," a 4-year-old male with attention deficit/hyperactivity disorder (ADHD) and oppositional defiant disorder. Multiple evidence-based treatment procedures were implemented, affording the opportunity to explore issues common to the clinical application of empirically supported interventions. Among the strategies utilized were behavioral parent training, school consultation and behavioral training of educators, school-based contingency management, and a behavioral daily report card. Numerous issues are discussed, including the limited evidence regarding interventions for preschool-age children with ADHD, factors influencing treatment planning and sequencing, collaboration with schools and parents, and evidence-based assessment of treatment gains.