Received: 16 April 2019
Accepted: 16 September 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The research was conducted according to The Ethical Standards for Research with Children (2003) and the standards of the Ethical Committee for Research of the Faculty of Humanities and Social Sciences in Osijek. Informed written consent was obtained from all individual participants included in the study, as well as their parents and school institutions. All supporting data can be accessed via e-mail, available on demand.
: Not applicable.
: The authors declare that they have no competing interests.