1. Institut of Psychology Albert‐Ludwigs‐Universität Freiburg Freiburg Germany
2. Centre for Mathematical Cognition, School of Science Loughborough University Loughborough UK
3. Leibniz‐Institut fuer Wissensmedien Tuebingen Germany
4. LEAD Graduate School and Research Network University of Tuebingen Germany
5. Individual Development and Adaptive Education for Children at Risk Center Frankfurt am Main Germany