Funding for this research was provided by:
Arbeidsmarktplatform Primair Onderwijs (not applicable)
Received: 28 August 2019
Accepted: 14 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: All researchers are employed at TNO and perform their work in alignment with the corporate code for research integrity. In the Netherlands, a study needs ethical approval when it falls under the scope of the Medical Research Involving Human Subjects Act (WMO). Then it must undergo a review by an accredited MREC or the CCMO. In general, research with human subjects only falls under the WMO if there is an infringement of the physical and/or psychological integrity of the subject [CitationRef removed]. As stated in Paragraph 1, Article 1b of the WMO, in the Netherlands research is subject to the WMO if two criteria are met: 1) the study concerns medical scientific research, and 2) participants are subject to procedures or are required to follow rules of behaviour. As present investigation does not concern medical scientific research the first criterium is not met, and an official approval by a Medical Ethical Review Board is not obligatory [CitationRef removed]. For this reason, the study did not require ethical approval at that time. From 15 March 2018 onwards, all human-related research that is not subject to WMO is reviewed by the Netherlands Organization for Applied Scientific Research Institutional Review Board. This study was carried out before this date and therefore not reviewed ethically.The participants were a priori informed about the aims and design of the study. Moreover, they were informed that participation was completely voluntary and anonymous. Participants did not receive any monetary compensation for their contribution and could withdraw from the study whenever they wanted. A (written) digital informed consent was obtained from all participants though the questionnaire. In the questionnaire, participants received information about the study and were asked for their consent to participate via a button that started the questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.