Stad, Femke E.
Wiedl, Karl H.
Vogelaar, Bart
Bakker, Merel
Resing, Wilma C. M. http://orcid.org/0000-0003-3864-4517
Funding for this research was provided by:
Leiden University
Article History
Received: 16 August 2017
Revised: 26 January 2018
Accepted: 20 March 2018
First Online: 9 April 2018
Compliance with ethical standards
: Written informed consent was obtained from all parents and schools. All procedures, including the informed consent and the recruitment of participants, were reviewed and approved by the institutional Committee Ethics in Psychology (CEP).