Evaluating Use and Attitudes Towards Social Media and ICT for Portuguese youth: the MTUAS-PY scale
Table 1: Eigenvalues and explained variance of Principal Components Analysis for Usage factors
| Component | Eigenvalues | % of Variance | Cumulative % |
| 1 | 13.319 | 30.270 | 30.270 |
| 2 | 4.272 | 9.709 | 39.979 |
| 3 | 3.729 | 8.475 | 48.453 |
| 4 | 2.125 | 4.830 | 53.283 |
| 5 | 1.759 | 3.998 | 57.282 |
| 6 | 1.664 | 3.783 | 61.064 |
| 7 | 1.456 | 3.309 | 64.373 |
| 8 | 1.401 | 3.185 | 67.558 |
| 9 | 1.198 | 2.722 | 70.281 |
| 10 | 1.111 | 2.524 | 72.805 |