As the field moves toward adaptive and individualized behavior intervention, it is important to identify and consider relevant student characteristics as potential levers (i.e., critical factors) for improving intervention effectiveness. Motivated by previous findings suggesting that behavioral profiles and teachers' perceptions of students with…

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…