There are errors in the author affiliations. The publisher apologizes for the errors. The correct affiliations are as follows:

Karol Konaszewski¹, Małgorzata Niesiobędzka¹, Janusz Surzykiewicz^2,3

1 Faculty of Education, University of Bialystok, Bialystok, Poland, 2 Faculty of Philosophy and Education, Katholische Universität Eichstätt-Ingolstadt, Germany, 3 Faculty of Education, Cardinal Stefan Wyszynski University in Warsaw, Poland.