| Educational Orientationa | SCS | 76 | 0.857 | 0.768 | 0.775 |
| ECS | 36 | 0.921 | 0.893 | 0.876 | |
| HLS | 78 | 908 | 0.846 | 0.859 | |
| Diagnosed learning disabilities | No | 562 | 0.900 | 0.852 | 0.833 |
| Yes | 70 | 0.917 | 0.888 | 0.853 | |
| Mothers language | Not Greek | 49 | 0.929 | 0.909 | 0.846 |
| Greek | 583 | 0.900 | 0.852 | 0.835 | |
| Language proficiency level | None or little | 82 | 0.939 | 0.900 | 0.891 |
| Good | 153 | 0.891 | 0.852 | 0.830 | |
| Very good | 239 | 0.889 | 0.837 | 0.826 | |
| Excellent | 158 | 0.861 | 0.791 | 0.781 | |
| Computer literacy | None | 11 | 0.905 | 0.862 | 0.849 |
| Little | 48 | 0.920 | 0.888 | 0.864 | |
| Good | 201 | 0.906 | 0.849 | 0.856 | |
| Very good | 227 | 0.894 | 0.831 | 0.834 | |
| Excellent | 145 | 0.882 | 0.863 | 0.773 | |
| Tutor’s help | No | 278 | 0.906 | 0.857 | 0.846 |
| Yes | 354 | 0.899 | 0.858 | 0.827 |