| Total | First grades | Final grades | Mann-Whitney | ||||
Mean | SD | Mean | SD | Mean | SD | U | p | |
PSS | 21.63 | 7.98 | 21.95 | 8.11 | 21.03 | 7.67 | 3816 | 0.27 |
LIS-E | 25.33 | 16.52 | 26.05 | 16.38 | 23.92 | 16.70 | 3889 | 0.37 |