Back to Resource Library On-task behavior of children with attention deficit hyperactivity disorder: Examining treatment effectiveness of play therapy interventions Schottelkorb, A.A., Ray, D.C. · 2009 ★ NIFPlay Rating: 4 Rating Scale 10 Rigorous play-specific science 6–9 General biological science 5 Sound play research (uncontrolled) 1–4 Less rigorous / indirect 0 Indirect but high value Single-case design study evaluating whether child-centered play therapy improves on-task classroom behavior in children with ADHD. View Resource