| Variables | Group | Pre | Post | |||
| Mean (SD) | Median | Mean (SD) | Median | |||
| Intelligence (CMMS) | EG | 116.66 (17.6) | 116 | 121.19 (20.91) | 118 | |
| CG | 110.60 (27.7) | 112 | 115.80 (16.13) | 119 | ||
| Memory (MTP) | EG | 5.32 (2.78) | 5 | 5.03 (2.36) | 5 | |
| CG | 4.46 (2.55) | 4 | 4.53 (1.88) | 5 | ||
| Receptive vocabulary (PPVT) | EG | 25.76 (16.21) | 27 | 38.23 (14.47) | 37 | |
| CG | 26.66 (12.74) | 22 | 26.60 (10.39) | 24 | ||
| RAN objects―time | EG | 134.81 (74.10) | 102 | 108.51 (35.93) | 105 | |
| CG | 123.05 (52.71) | 125 | 92.64 (20.86) | 93 | ||
| RAN objects―error | EG | 3.95 (3.12) | 3 | 3.02 (3.32) | 2 | |
| CG | 4.17 (5.68) | 2 | 4.05 (3.41) | 3 | ||
| Phonological awareness (PAT-OP) | EG | 8.43 (3.32) | 8 | 9.87 (4.51) | 9 | |
| CG | 5.11 (3.21) | 7 | 8.77 (4.60) | 10 | ||