Two large-scale samples from a nationally representative
study were used to classify online gamers with CIU.
Using a data-driven approach, analyses showed the existence
of six distinct groups within the data. The vast
majority of online gamers (95%) are located in four
groups, which show a linear increase in CIU as the hours
per week of gaming increase. The fifth and sixth groups
break this trend. The fifth group is identified as a group of
heavy online gamers who playmany hours per week, but
show stability or even a drop in addiction (2008) when
compared to the previous groups. This group of nonaddicted
heavy online gamers is relatively small (about
1–2% of the online gamers, see Table 3).