Livazović, Goran http://orcid.org/0000-0002-0277-5534
Matić, Marina
Article History
First Online: 1 May 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: 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 <i>The Ethical Standards for Research with Children</i> (Dulčić et al. CitationRef removed).
: Informed consent was obtained from all individual participants included in the study. A board in each school approved the questionnaires beforehand. Prior to implementation, the parents and students were informed and written consent was obtained.