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Factor Analysis and Cronbach’s alpha for the SI.
| Scales | n Items | Factors | Variance Explained | Alpha | KMO/Bartlett |
|---|---|---|---|---|---|
| Substances | 8 | 1 | 57.33% | 89 | (KMO) = 0.89; Bartlett <0.001 |
| Alcohol | 7 | 1 | 57.86% | 87 | (KMO) = 0.87; Bartlett < 0.001) |
| Gambling | 12 | 1 | 58.67% | 93 | (KMO) = 0.93; Bartlett < 0.001) |
| Internet | 7 | 1 | 54.36% | 84 | (KMO) = 0.86; Bartlett < 0.001) |
