Published on in Vol 22, No 1 (2020): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12599, first published
.

1 Faculty of Industrial Design Engineering, Delft University of Technology, Delft, The Netherlands
2 Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek (TNO), Department of Perceptual and Cognitive Systems, Soesterberg, The Netherlands
