1. Department of Educational Sciences University of Potsdam Potsdam Germany
2. Institute of Education, National Anti‐Bullying Research and Resource Centre Dublin City University Dublin Ireland
3. School of Education University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
4. Institute for Research, Development and Evaluation Bern University of Teacher Education Bern Switzerland
5. Department of Health Sciences Brandenburg University of Technology Cottbus‐Senftenberg Cottbus Germany