Table 1.
Psychometric characteristics of the questionnaires included in the study.
| Questionnaire | Cronbach’s Alpha | χ2 df, p |
CFI | TLI | RMSEA (90% CI) |
|---|---|---|---|---|---|
| Chen Internet Addiction Scale (CIAS) | 0.909 | 5890 299 *** |
0.837 | 0.823 | 0.064 (0.063–0.066) |
| Game Addiction Scale for Adolescents (GASA) | 0.917 | 688 14 *** |
0.968 | 0.952 | 0.103 (0.097–0.110) |
| Social Media Disorder Scale (SMDS) | 0.679 | 464 27 *** |
0.898 | 0.865 | 0.060 (0.055–0.065) |
| Strengths and Difficulties Questionnaire (SDQ) | 0.656 | 8272 275 *** |
0.528 | 0.485 | 0.080 (0.079–0.081) |
Note: CFI—comparative fit index; TLI—Tucker–Lewis index; RMSEA—root mean square error of approximation; CI—confidence interval. ***: p < 0.001.