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 |