“…Adelman et al (1984) were the first to explore empirically client participation in the child mental health treatment literature. However, it was studied even earlier in the adult treatment literature (Bellak & Smith, 1956;Kirtner & Carwright, 1958;Strupp, Chassan, & Ewing, 1966). Client participation includes constructs that have been labeled as client effort, collaboration, client involvement in therapy, cooperation, treatment engagement, on-task behavior, and homework completion (Adelman et al, 1984;Braswell et al, 1985;Clarke et al, 1992;Gorin, 1993;Green, 1996;Johnson, 2000;Sarlin, 1992;Tolan, Hanish, McKay, & Dickey, 2002).…”