The purpose of the current investigation was to pilot the Family Check-Up (FCU; see T. J. Dishion & K. with 10 incarcerated adolescents and their parents or guardians. The FCU is based on principles of motivational interviewing (W. R. Miller & S. Rollnick, 2002). The authors delivered FCU with a high degree of fidelity and adherence on the basis of ratings from parents, therapists, and observers. Results suggest that the FCU positively impacted families (effect sizes were generally in the medium range). After our intervention, adolescents were more confident in their ability to resist drug use, and parents were more confident in their ability to impact their adolescents' risky behaviors. Parents and adolescents both reported being highly satisfied with this intervention. These results warrant further investigation of the FCU with incarcerated adolescents and their families in a controlled clinical trial.It is important to develop and evaluate treatments specifically for incarcerated adolescents. Treatments delivered to juvenile justice system-involved adolescents are emerging, but wellcontrolled clinical trials have mainly been conducted on an outpatient basis (Dennis et al., 2002;Henggeler, Schoenwald, Borduin, Rowland, & Cunningham, 1998). Unfortunately, many juvenile justice system adolescents have been or will be incarcerated at some point, and it is important to study methods of effectively treating them and their families in this unique setting (i.e., during incarceration).In addition to problems with delinquent behavior, incarcerated adolescents have high rates of substance use problems (Teplin, Abram, McClelland, Dulcan, & Mericle, 2002 (Miller & Rollnick, 2002) and is designed to enhance parental recognition of their child's risk behaviors and to provide support for reducing these risk factors. There is an initial interview, followed by a multimethod assessment and, finally, a feedback session. The FCU is based on the premise that providing psychological assessment feedback to families promotes motivation for change (Sanders & Lawton, 1993). The FCU includes the techniques endorsed by researchers in the field of family-based interventions (Hogue & Liddle, 1999): focusing on protective factors in the family (parental strengths and competencies), presenting normative developmental guidelines, intervening in both parenting practices and family process characteristics, using skill-oriented rather than psychoeducational interventions; and attending to the psychosocial issues of the parents.The FCU is an intervention primarily for parents and guardians and is designed to support appropriate parenting and provide motivation to change maladaptive parenting . Feedback is provided to parents on the basis of a multimethod assessment, which includes their pretreatment assessment and the Family Assessment Task (FAT; see Method). There are four key elements in providing feedback: emphasizing the importance of parenting to the adolescent's success, focusing on harm reduction, tailoring feedback, and supportin...