Published on in Vol 20, No 6 (2018): June
1 Bristol Interaction Group, Faculty of Engineering, University of Bristol, Bristol, United Kingdom
2 Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
3 National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, United Kingdom
4 School of Computer Science, University College Dublin, Dublin, Ireland
*these authors contributed equally