Disruptive behavior problems frequently emerge in the preschool years and are associated with numerous, long-term negative outcomes, including comorbid disorders. First Step is a psychosocial early intervention with substantial empirical evidence supporting its efficacy among young children. The present study reports on a validation study of the…

The study reported in this paper examined the effects of "First Step to Success (First Step)," a school- and home-based program intended to improve outcomes for students with moderate to severe behavior problems who may be at risk for academic failure. The study took place in six locations across five states: San Jose, California; Tampa,…

First Step to Success (First Step; Walker et al., 1997, 1998) is a secondary-level intervention for students with behavior problems in early elementary school. The purposes of this study were to assess whether effects in student behavior and academics at posttest shown in a recent efficacy trial (Walker et al., 2009) were maintained at follow-up…