Early Intervention for Preschoolers at Risk for Attention-Deficit/Hyperactivity Disorder: Preschool First Step to Success

This study evaluated the efficacy of the Preschool First Step (PFS) to Success early intervention for children at risk for attention deficit hyperactivity disorder (ADHD). PFS is a targeted intervention for children 3–5 years old with externalizing behavior problems and addresses secondary prevention goals and objectives. As part of a larger multisite, randomized controlled trial, the efficacy of the PFS program was evaluated on a subsample of...