Published on in Vol 5 , No 2 (2018) :Apr-Jun
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9946, first published
.

1 Ulster University, School of Computing, Newtownabbey, GB
2 Ulster University, School of Psychology, Coleraine, GB
3 Ulster University, School of Computing, Jordanstown, GB
*all authors contributed equally