When it comes to the amount of time spent online, studies
show that individuals, who regard themselves as Internet
addicts, indicated that it varies greatly from 8.5 hours per
week to 21.2 hours per week (Yang and Tung, 2007). Other
studies found that the higher the amount of time spent online,
the greater the extent of the symptoms of Internet addiction
(Leung, 2004; Widyanto and McMurran, 2004).