1. Faculty of Philosophy and Education, Katholische Universität Eichstätt-Ingolstadt, Eichstätt, Germany
2. School of Human Sciences, University of Economics and Human Sciences in Warsaw, Warsaw, Poland
3. Department of Psychology, Luther College, Decorah, IA, USA
4. Faculty of Education, University of Białystok, Białystok, Poland
5. Faculty of Education, Cardinal Stefan Wyszyński University in Warsaw, Warsaw, Poland