The centerpiece of the project will be a prospective observational study of 5-12 year-old children and their parents who attend family-systemic interventions in different practical settings. The observational study is further based on multisource (i.e. child, parent and teacher report) assessment design. The study has been approved by the Research Ethics Committee of the Hospital District of Southwest Finland and the Research Ethics Committee of the Kela research department. Study approval from the Hospital District of Southwest Finland is in process.