Funding for this research was provided by:
Received: 8 April 2021
Accepted: 18 October 2021
First Online: 1 November 2021
: Ethical approval was given by the Human Ethics Committee at the University of Duisburg-Essen, Faculty of Educational Sciences. Participants’ assent and parents’ written informed consent were obtained prior to the start of the study. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.