Received: 6 December 2018
Accepted: 3 June 2019
First Online: 30 August 2019
Ethics approval and consent to participate
: Based on the guidelines of the Ethical Review Board of Tilburg University School of Humanities and national regulations at the time of its running, this study did not require full approval from our review committee, but nevertheless did undergo an internal departmental review process. All participants gave informed written consent prior to the experiment.
: Not applicable.
: The authors declare that they have no competing interests.