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The means and standard deviations of key variables by grades
| Grades | F | LSD | |||
|---|---|---|---|---|---|
| Grades 1 | Grades 2 | Grades 3 | |||
| Parental psychological control | 25.10(9.02) | 25.70(9.39) | 27.68(8.72) | 6.87** | 3 > 1,2 |
| Self-concept clarity | 35.22(5.62) | 34.70(5.21) | 33.48(5.73) | 8.20*** | 1,2 > 3 |
| Depression | 8.97(6.85) | 10.48(7.48) | 11.87(7.30) | 13.45*** | 3 > 2 > 1 |
| Mindfulness | 56.49(13.28) | 53.40(11.22) | 51.47(12.94) | 13.60*** | 1 > 2,3 |
***p < 0.001, **p < 0.01, *p < 0.5
