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Childhood and youth research, deviant behavior and desistance, political extremism and participation, migration and interethnic relations, methods of empirical social research.
2005 Habilitation at Hildesheim University with publications on the topic “Abweichung und Aushandlung. Kindliche Auffälligkeit im Kontext ihrer familialen Bearbeitung” (“Deviation and Negotiation. Childlike Conspicuousness within the Context of Its Familial Treatment” – venia legendi in sociology
1996 Dissertation at Hildesheim University on the topic “Ethnozentrismus. Qualitative Analysen ethnozentrischer Orientierungen und Bedingungen ihrer Sozialisation bei jungen Männern” (“Ethnocentricity. Qualitative Analyses of Ethnocentric Orientations and Conditions of Their Socialization for Young Men”)
1989–1991 Postgraduate program “Qualitative Methoden in den Sozialwissenschaften” (“Qualitative Methods in Social Sciences”) at the Freie Universität Berlin
1983–1987 Certified pedagogue degree from the Freie Universität Berlin
2009– Professor for Extracurricular Education at the University of Zurich’s Institute of Education
2008 and 2009 Visiting professor for Extracurricular Education at the former Pedagogical Institute of the University of Zurich
2007–2009 Project group leader at the German Youth Institute, branch Leipzig/Halle
2006–2009 Private lecturer at the Institute of Social Sciences at Hildesheim University
1998–2007 Researcher at the German Youth Institute, branch Leipzig/Halle
1995–1997 Researcher at the department Social Services at the University of Applied Sciences Potsdam
1994–1995 Doctoral scholarship at Hildesheim University
1991–1993 Researcher at the Institute of Social Sciences at Hildesheim University; Researcher at the Institute of Sociology at the Freie Universität Berlin
1990–2006 Lecturer at various universities and universities of applied sciences
Biographical Experiences and Political Engagement in Adolescence
Unaccompanied Minor Refugees in Institutional Care: Chances and Challenges
Peer-Specific Socialisation Processes during Adolescence
Ways out of Delinquency – Reintegration of Young Convicted Delinquents
Socio-Emotional Abuse of Adolescents