Table 1.

GAS and its concordance with the DSM-5 proposed criteria for Internet gaming disorder

	How often in the last six months…	Internet gaming disorder: proposed criteria (DSM-5)a
Item 1	Have you thought all day long about playing a game ?	Preoccupation (item 1)
Item 2	Have you played longer than intended?	Withdrawal (item 5)
Item 3	Have you played games to forget about real life?	Tolerance (item 2)
Item 4	Have others unsuccessfully tried to reduce your time spent on games ?	Unsuccessful attempts to reduce or stop (item 4)
Item 5	Have you felt upset when you were unable to play ?	Loss of interests in other activities (7)
Item 6	Have you had arguments with others (e.g. family, friends) over your time spent on games ?	Continue despite problems (item 7)
Item 7	Have you neglected important activities (e.g. school, work, sports) to play games?	Deceived others (item 6)
		Escape (item 3)
		Lost relationships or opportunities

^aThe suggested GAS items for each criteria are shown in parentheses. Number of criteria: 5 or more. Time criteria: 12 months