Funding for this research was provided by:
Stiftung Mercator
Article History
Received: 30 September 2020
Accepted: 21 October 2020
First Online: 10 November 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: Ethical approval for the project from which the current data were taken was obtained by the responsible school administrations. In Germany, institutional approval by a university ethics board is not typically required for projects of this type. In compliance with established ethical principles, participation was voluntary and parents’ informed consent was obtained before participation.
: Informed consent was obtained from students included in the study and their parents.