“…In other words, programs that are higher in fidelity will have better outcomes. This hypothesis has been examined in a wide range of practices, with generally moderate to strong support for the fidelityÀoutcome relationship (e.g., Blakely et al, 1987;Henggeler, Pickrel, & Brondino, 1999;Jerrell & Ridgely, 1999;McDonnell, Nofs, Hardman, & Chambless, 1989;Oxman et al, 2006). This hypothesis has been extensively examined for two of the practices implemented in the current project, that is, SE (Becker, Smith, Tanzman, Drake, & Tremblay, 2001;Becker, Xie, McHugo, Halliday, & Martinez, 2006;McGrew & Griss, 2005;McGrew, 2007) and ACT (Bond & Salyers, 2004;Latimer, 1999;McGrew, Bond, Dietzen, & Salyers, 1994;McHugo, Drake, Teague, & Xie, 1999).…”