The Conceptualisation and Measurement of DSM-5 Internet Gaming Disorder: The Development of the IGD-20 Test Pontes, Halley M. ; Király, Orsolya ; Demetrovics, Zsolt ; Griffiths, Mark D. Abstract Publication: PLoS ONE Pub Date: October 2014 DOI: 10.1371/journal.pone.0110137 Bibcode: 2014PLoSO...9k0137P