TABLE 1.

The Internet Gaming Disorder scale (IGD scale).

1	Have you spent a lot of time thinking about games or planned gaming? (Preoccupation)
2	Did you get annoyed, uneasy or upset when you couldn’t play? (Withdrawal)
3	Have you felt the need to play more and more? (Tolerance)
4	Have you tried to cut down on gaming without succeeding? (Loss of control)
5	Have you lost interest in previous hobbies and leisure activities because of gaming? (Giving up other activities)
6	Did you continue to play even though it created problems for you? (Continuing despite problems)
7	Have you lied to family members, therapists or others about how much you have played? (Deception)
8	Did you play to reduce negative feelings (like helplessness, guilt, anxiety)? (Escape)
9	Have you risked or ruined an important relationship, job, education or career opportunity because of gaming? (Negative consequences)