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Authors
Lange-Küttner, C. https://orcid.org/0000-0001-6021-8931
Lockl, K. https://orcid.org/0000-0002-6098-7869
Gnambs, T. https://orcid.org/0000-0002-6984-1276
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Funding
Funding for this research was provided by:
Universität Bremen
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Article History
Accepted: 24 July 2025
First Online: 2 September 2025
Declarations
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: Before data collection, permission was obtained from the government of each Bundesland. Permission was also obtained from each school.
: Informed consent was obtained from parents and adolescent participants. Withdrawal from the study could be sent via email at any time without disadvantage and the individual dataset would be deleted from each point of measurement.
: The authors report that there are no competing interests to declare.
