• Juvenile has an estimated IQ-score of 80 or higher and/or sufficient adaptive skills to benefit from the intervention. The estimated IQ-score is measured using the Screener voor intelligentie en licht verstandelijke beperking (SCIL). The score on the SCIL determiners whether an IQ-test and/or a measurement of adaptive skills using the ADAPT is necessary;

• Juvenile is aged 12-21 years old at intervention start;

• Juvenile exhibits externalizing behavior that results in problems in at least two areas of life (family, school, leisure time), determined by referrer information and/or intake;

• Juvenile has a medium to high recidivism risk, measured by the Risicotaxatie-instrument voor de Ambulante Forensische GGZ Jeugd (RAF GGZ Jeugd) and/or the Landelijk Instrumentarium Jeugdstrafrechtketen (LIJ);

• Presence of juvenile-caregiver relationship problems, as measured by the RAF GGZ Jeugd;

• Juvenile has a diagnosis of a DSM-5 behavioral disorder, which is determined using case file analysis or a new diagnostic process;

• Caregiver(s) and juvenile cannot be motivated to follow treatment at the outpatient clinic;

• Juvenile and caregiver(s) have sufficient Dutch language skills, as estimated by the FAST therapist team;

• Treatment can be offered in either a voluntary or mandatory framework;

⁃ Juvenile resides with their caregiver(s) or is expected to return to residing with caregiver(s) within the first two months of intervention.

‣ A potential subject who meets any of the following criteria will be excluded from participation in this study: