9. Indicate to what degree you agree or disagree with the statements below.
	Never	Rarely	Sometimes	Often	Frequently
Item 1. Someone criticizes or warns me about using the mobile phone too much
Item 2. I set a limit to my mobile phone use but do not manage to stick to it
Item 3. I argue with my relatives about the cost of my mobile phone use
Item 4. I spend more time than I would like to using my mobile phone
Item 5. I feel that I use my mobile in an excessive manner
Item 6. I go to sleep later or sleep less because of my mobile phone use
Item 7. I spend more money than initially expected on my mobile phone use
Item 8. I use my mobile phone because I am bored
Item 9. I use my mobile phone in situations where it is inappropriate (although not dangerous) to do so
Item 10. I have been criticized because of the cost of my mobile phone use
10. Indicate how frequently the statements below apply to you.
	Completely disagree	Disagree somewhat	Neutral	Agree somewhat	Completely agree
Item 11. When I haven't used my mobile phone for a while, I feel the need to call someone, send an sms or to contact someone through social media
Item 12. Lately I've been using my mobile phone more and more
Item 13. If my mobile phone were broken for an extended period of time and I wasn't able to use it, I'd feel bad
Item 14. I need to use my mobile phone more and more
Item 15. If I don't have my mobile phone, I feel bad
Item 16. When my mobile phone is in my hand, I can't stop using it
Item 17. It is not enough to use my mobile phone in the way I did when I first got it, I am steadily using it more and more
Item 18. The first thing I do when I get up in the morning is to see if someone has called me, sent me an SMS or written to me through social media
Item 19. I spend more money on my mobile phone now than when I first got it
Item 20. I don't think I could stand 1 week without a mobile phone
Item 21. When I feel lonely, I call someone, send an SMS or send a message through social media
Item 22. Right now I feel like making a call, sending an SMS or sending a message through social media
11. Gambling (e.g., online, at a Casino, slot machines or sports betting?).
Have there ever been periods lasting 2 weeks or longer when you spent a lot of time thinking about gambling experiences or planning out future gambling ventures or bets?
Yes	No
12. Have you ever tried to stop, cut down or control your gambling?
Yes	No
13. Have you ever lied to family members, friends or others about how much you gamble and how much money you lost on gambling?
Yes	No
14. Gaming not concerning money (e.g., computer games, video games, mobile phone games). Have there ever been periods lasting 2 weeks or longer when you spent a lot of time thinking about gaming experiences or planning out future gaming?
Yes	No
15. Have you ever tried to stop, cut down or control your gaming?
Yes	No
16. Have you ever lied to family members, friends or others about the extent of your gaming?
Yes	No
17. Have you ever received professional care, treatment or counseling for gambling problems or gambling disorder?
Yes	No
18. Have you ever received professional care, treatment or counseling for alcohol- or drug-related problems?
Yes	No

Descriptive data: 1–8. The TMD: 9–10. NODS-CLiP gambling: 11–13. NODS-CLiP gaming: 14–16. Previous addiction treatment: 17–18.