| Variables | minimum | maximum | mean | Std. deviation | skewness | kurtosis |
| Autonomy support | 1.5 | 5 | 3.98 | 0.922 | −0.624 | −0.661 |
| Cognitive support | 1.5 | 5 | 4.01 | 0.922 | −0.644 | −0.695 |
| Emotional support | 1.67 | 5 | 4.02 | 0.943 | −0.72 | −0.601 |
| Perceived teacher support | 1.889 | 5 | 4.00 | 0.903 | −0.647 | −0.77 |
| Behavioral engagement | 2 | 5 | 4.10 | 0.760 | −0.547 | −0.385 |
| Cognitive engagement | 1.4 | 5 | 3.95 | 0.810 | −0.388 | −0.542 |
| Emotional engagement | 1.5 | 5 | 3.91 | 0.727 | −0.235 | −0.371 |
| Online learning engagement | 2.15 | 5 | 3.99 | 0.715 | −0.335 | −0.492 |
| Self-efficacy in learning ability | 1.44 | 5 | 3.47 | 0.829 | 0.134 | −0.805 |
| Self-efficacy in learning behavior | 1.67 | 5 | 3.45 | 0.825 | 0.139 | −0.823 |
| Academic self-efficacy | 1.889 | 5 | 3.46 | 0.810 | 0.168 | −0.853 |