1. LEAD Graduate School and Research Network, University of Tübingen Leibniz-Institut für Wissensmedien, Tübingen, Germany
2. Leibniz-Institut für Wissensmedien, LEAD Graduate School and Research Network, University of Tübingen, Tübingen, Germany
3. Leibniz-Institut für Wissensmedien, Department of Psychology, LEAD Graduate School and Research Network, University of Tübingen, Tübingen, Germany
4. Department of Computer Science, LEAD Graduate School and Research Network, University of Tübingen, Tübingen, Germany
5. Hector Research Institute of Education Sciences and Psychology, LEAD Graduate School and Research Network, University of Tübingen, Tübingen, Germany