In this cohort, adolescents serve as the primary respondents. The parents were interviewed about family background only once in the first wave. If the parents did not participate in this survey themselves, but agreed to the participation of the adolescent target persons, the latter were asked in the first wave corresponding questions about the country of origin, the social background of the family, and the educational experiences of the parents.
The consideration of the institutional context was achieved by interviewing teachers and principals at general educational schools, and in later waves also teachers and principals at vocational schools. In this way, supplementary information on the educational offerings was collected. Furthermore, questionnaires were used to receive individual assessments with regard to the linguistic and social competencies of each adolescent target person by the respective class teachers.
Another group of respondents, from whom information on the regional context of the participating families was collected (e.g., ethnic composition, infrastructural conditions), consisted of the staff responsible for the integration of refugees in the respective municipalities and the staff of the relevant collective accommodations.