Funding for this research was provided by:
Received: 1 June 2021
Accepted: 1 September 2021
First Online: 10 September 2021
: Participants’ assent and written informed consent was obtained before the start of the study. Ethical permission was given by the Human Ethics Committee at the University of Duisburg-Essen, Faculty of Educational Sciences.
: Not applicable.
: The authors declare that they have no competing interests.