Table 1.

Three items comprising the Three-Item Gaming disorder Test-Online-Centered (TIGTOC), an online gaming disorder screening tool with 4-point Likert scale

Questions	Not at all	Occasionally	Frequently	Always
1. I have tried to cut down playing Internet games, but I have not been successful.	0	1	2	3
2. I have lost interest in other hobbies or recreational activities I enjoyed before because of Internet games.	0	1	2	3
3. Despite social and psychological problems, I continue playing Internet games excessively.	0	1	2	3