Table 1. Correlations between main variables.
| Variable | 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. | 9. | 10. | 11. |
| 1. Net screen time | - | ||||||||||
| 2. Total screen time | 0.94*** | - | |||||||||
| 3. Self-reported usage | 0.56*** | 0.49*** | - | ||||||||
| 4. LDR proportion | -0.25* | -0.17 | -0.23* | - | |||||||
| 5. ln overall k | 0.21* | 0.14 | 0.22* | -0.98*** | - | ||||||
| 6. Self-control | -0.32** | -0.32** | -0.18 | 0.16 | -0.14 | - | |||||
| 7. Consideration of future consequences | -0.17 | -0.12 | -0.12 | 0.07 | -0.06 | 0.46** | - | ||||
| 8. Response inhibition | 0.00 | -0.03 | 0.00 | -0.19 | 0.22* | 0.02 | 0.07 | - | |||
| 9. Age | 0.09 | 0.06 | -0.13 | 0.05 | -0.07 | -0.05 | 0.06 | -0.19 | - | ||
| 10. Years of ownership | -0.04 | -0.07 | -0.08 | 0.11 | -0.11 | 0.12 | 0.00 | 0.02 | 0.28 | - | |
| 11. Disposable income | -0.05 | -0.07 | 0.06 | -0.10 | 0.13 | 0.05 | -0.09 | 0.05 | 0.14 | 0.12 | - |
*p < 0.05,
**p < 0.01,
*** p < 0.001.