“…This optimism, however, stands in contrast to observations from the treatment outcome literature indicating that a significant proportion of clientsapproximately 5%-10% in adult studies-appear to get worse over the course of treatment (Lambert & Ogles, 2004;Lilienfeld, 2007;Mohr, 1995). Deterioration rates for children and adolescents served in community mental health settings appear to be particularly high, in some settings exceeding 20% (Warren, Nelson, & Burlingame, 2009;Warren, Nelson, Mondragon, Baldwin, & Burlingame, 2010). Labeled in various contexts as treatment failures, deteriorators, or not-on-track clients (Lambert & Ogles;Lilienfeld;Lambert, Whipple, Bishop, Vermeersch, Gray, & Finch, 2002), such cases have historically received little attention in treatment outcome research (Barlow, 2010;Lilienfeld).…”