ABSTRACT
In recent years, the Internet has increased its position in business and leisure activities, and
the use of this medium for gambling has grown as well. Several 12-month estimates show
that the prevalence of online gambling has been between 0.3% and 3.7% across different
countries and territories over the last decade (Wood & Williams, 2009). A recent
investigation in Great Britain revealed that 14% of adults used the Internet for gambling
over the past year (including the purchase of lottery tickets; Wardle, Moody, Griffiths,
Orford, & Volberg, 2011). Due to certain situational and structural characteristics (e.g.
availability, anonymity, virtual payment methods, high event frequency and density),
Internet gambling has high potential risks for problem gambling (Griffiths & Barnes,
2008; Griffiths, Wardle, Orford, Sproston, & Erens, 2009; Hayer, Bachmann, & Meyer,
2005; McBride & Derevensky, 2009). In line with these assumptions, analyses of self-
selected (MacKay & Hodgins, in press; McBride & Derevensky, 2009; Wood, Griffiths, &
Parke, 2007; Wood & Williams, 2007) and representative samples (Bu
