Funding for this research was provided by:
European Research Council Starting Grant (716657)
University College Lillebælt, Odense, Denmark (())
Received: 13 December 2019
Accepted: 29 April 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: <i>Ethical approval</i> for the field test study with parents of 243 children was obtained from The Regional Committees on Health Research Ethics for Southern Denmark (Project-ID: S-20170033). Parents provided written informed consent before reporting on behalf of their children. The committee judged that ethical approval was not required for the pilot studies with ten parents and test-retest reliability evaluation with 35 parents (Project-ID: S-20170030).
: Not applicable.
: The authors declare that they have no competing interests.