“…The reviewers concluded that child and adolescent psychotherapies were also beneficial (Bratton, Ray, Rhine, & Jones, 2005;Casey & Berman, 1985;Erion, 2006;Fossum, Handegard, Matinussen & Morch, 2008;Maughan, Christiansen, Jenson, Olympia, & Clark;Kazdin, Bass, Ayers, & Rodgers, 1990;Lewinson & Clarke, 1999;McLeod & Weisz, 2004;Michael & Crowley, 2002;Reinecke, Ryan, & DuBois, 1998a, 1998bStage & Quiroz, 1997;Weisz, McCarty, & Valerie, 2006;Weisz, Weiss, Alicke, & Klotz, 1987;Weisz, Weiss, Han, Granger, & Morton, 1995). Averaging across all the ESs in these reviews produced the following results: a mean ES of 0.71 (95% CI 0.56-0.85; standard deviation of 0.27).…”