1. Department of Educational Sciences, Vrije Universiteit Brussel, Brussels, Belgium
2. Section for Teacher Education and Research, University of Trier, Trier, Germany
3. Professional School of Education, Humboldt-Universität zu Berlin, Berlin, Germany
4. School of Psychology, University of Monterrey, Monterrey, Mexico
5. School for Educational Studies, Hasselt University, Hasselt, Belgium