1. Department of Psychology, University of Florence, Florence, Italy.
2. Department of Psychology, Gothenburg University, Gothenburg, Sweden.
3. Department of Psychology, University of Cordoba, Cordoba, Spain.
4. Department of Educational Science and Psychology, Freie Universität Berlin, Berlin, Germany.
5. Institute of Education, University of Tartu, Tartu, Estonia.
6. Département des Sciences de l'éducation, IREDU/CNRS UMR 5225–Un.de Bourgogne, DIJON Cedex, France.
7. Goldsmiths College–University of London, London, United Kingdom.