Forensic Ambulant Systemic Therapy (FAST) is a promising treatment for juveniles aged 12-21 showing antisocial behavior and conduct disorders. Next to regular FAST (FASTr), a blended version was developed (FASTb), in which face-to-face contact is replaced by minimally 50% online contact over the duration of intervention, consisting of video-calls and eHealth modules. The primary aim of the current study is to investigate whether FASTb is equally effective as FASTr. All clients (and their caregivers) who meet the inclusion and eligibility criteria and who signed informed consent will be assigned to either the FASTr or FASTb condition. Randomization will be done on the family level and will not depend on therapist or treatment site.
The purpose of this study is to investigate whether blended Forensic Ambulant Systemic Therapy (FASTb) is equally effective as regular FAST (FASTr).