“…Youth completing specialized treatment for their substance use show better follow-up outcomes (Williams, Chang, & Addiction Centre Adolescent Research Group, 2000; Winters, Latimer, & Stinchfield, 1999) in the areas of drug use, criminal activity, psychological adjustment, and school performance (Hser et al, 2001; Joe, Knight, Becan, & Flynn, 2014). While effective treatments exist, numerous studies have found that sizable individual differences in client responsiveness to treatment manifest even when administered with attention to protocol adherence (Dennis et al, 2004; Waldron, Slesnick, Brody, Turner, & Peterson, 2001).…”