Received: 5 November 2020
Accepted: 25 June 2021
First Online: 8 July 2021
: The study was conducted following the principles of the Helsinki Declaration and the Swiss Federal Act on Data Protection (FADP). The institutional ethics committee of the University of Teacher Education Bern, Commission for Research and Development (KFE) approved the study. All data was anonymized from the beginning, protecting the identity of all the individual participants. Informed written consent was obtained from all participants and their respective parents or guardians.
: Informed written consent was obtained from all participants and their respective parents or guardians.
: The authors declare that they have no competing interests.