“…The modest associations between adherence measures and youth outcomes argue for further refinement and validation of the MST adherence measure, especially in light of the well-established effectiveness of MST with challenging clinical populations and the increasing dissemination of MST programs. Fam Proc 39:83-103, 2000 T HE recent publication of sobering findings regarding the failure of service system initiatives to impact child outcomes differentially (Bickman, 1996;Bickman, Summerfelt, Firth, & Douglas, 1997) and mixed evidence regarding service effectiveness (Burns, Hoagwood, & Maultsby, 1998;Fraser, Nelson, & Rivard, 1997;Hoagwood & Erwin, 1997;Jensen, Hoagwood, & Petti, 1996) have drawn attention to the specific nature of clinical interventions deployed via innovative services and service system initiatives (Henggeler, Schoenwald, & Munger, 1996;Kingdon & Ichinose, 1996;Oswald & Singh, 1996;Rosenblatt, 1996;Weisz, Han, & Valeri, 1997). Such attention is warranted because psychotherapy of some type continues to bear the burden of producing change in the referral problems irrespective of the service system (mental health, juvenile justice) or setting (clinic, family home, school, group home) in which youth with complex problems receive treatment (Kazdin, 1994).…”