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Table 1 Mean, SD, Cronbach’s alpha, and item-total correlation among IAT items

From: Psychometric properties of a Thai version internet addiction test

  Mean SD Corrected item-total correlation Squared multiple correlation Cronbach’s alpha if item deleted
1. Stay online longer than intended 3.25 0.996 0.438 0.343 0.884
2. Neglect household chores 2.41 1.149 0.496 0.407 0.883
3. Prefer excitement of internet 1.81 1.051 0.509 0.328 0.882
4. New relationships with online users 1.59 1.188 0.313 0.179 0.888
5. Others complain to you 1.2 1.052 0.553 0.361 0.881
6. Your work suffers 1.25 1.134 0.542 0.425 0.881
7. Check email before something else 1.03 1.23 0.363 0.235 0.887
8. Your job performance suffers 1.4 1.054 0.578 0.461 0.88
9. Become defensive when asked 0.74 0.918 0.496 0.351 0.882
10. Block out disturbing thoughts 1.09 1.128 0.536 0.345 0.881
11. Find yourself anticipating 1.56 1.104 0.563 0.417 0.881
12. Fear life without the internet 1.72 1.344 0.439 0.357 0.885
13. Snap if someone bothers 0.46 0.808 0.52 0.372 0.882
14. Lose sleep due to being online 2.24 1.289 0.522 0.353 0.882
15. Feel preoccupied with the internet 0.67 0.964 0.56 0.444 0.881
16. “Just a few more minutes” 1.73 1.444 0.482 0.382 0.884
17. Try to cut down the amount of time 1.78 1.231 0.583 0.479 0.88
18. Try to hide how long 0.67 0.946 0.56 0.377 0.881
19. Prefer spending time online 1.49 1.235 0.505 0.317 0.882
20. Feel depressed, when off-line 0.75 1.03 0.528 0.42 0.881