Translation of the Methodological Reports “F2F 3”, “F2F 4” and “CATI 3” of the TwinLife Study

TwinLife is a large-scale longitudinal study for which more than 4,000 twin pairs and their families in Germany have been surveyed since 2014 on various aspects of their lives, including education, careers, integration and participation in society, quality of life, mental and physical health, and behavioural problems. The surveys were conducted both face to face and by telephone. The resulting data help to shed light on how social differences arise, as they make it possible to study not only the effects of social circumstances but also genetic factors and individual development. On behalf of infas, we translated the methodological reports for several waves of the study into English.