Table 3.
Item response theory (IRT) analysis of DSM-5 IGD: active gamers (n = 2,547)
| Criterion | IRT parameters | |
|---|---|---|
| Discrimination (SE) | Difficulty (SE) | |
| 1. Preoccupation (G) | 1.70 (0.10) | −0.10 (0.04) |
| 2. Withdrawal | 2.15 (0.15) | 1.67 (0.07) |
| 3. Tolerance | 2.39 (0.14) | 0.79 (0.04) |
| 4. Loss control | 2.03 (0.13) | 1.37 (0.06) |
| 5. Giving-up activities | 2.60 (0.16) | 1.04 (0.04) |
| 6. Continuation | 2.74 (0.17) | 0.37 (0.03) |
| 7. Deception (G) | 2.48 (0.17) | 1.51 (0.06) |
| 8. Escape (G) | 1.90 (0.11) | 0.82 (0.04) |
| 9. Negative consequences (G) | 2.75 (0.24) | 1.81 (0.07) |
| Model fit indices | ||
| AIC | 17,800.8 | |
| BIC | 17,906.0 | |
| SS-BIC | 17,848.8 | |
Note. AIC: Akaike information criterion; BIC: Bayesian information criterion; SS-BIC: sample-size corrected BIC; SE: standard error. G: item from the DSM-IV Gambling Disorder Criteria; DSM-5: fifth edition of the Diagnostic and Statistical Manual of Mental Disorders; IGD: Internet gaming disorder.