Table 2.
Means and (Standard Deviation) of attention, production of vowels, phonemes, words, and EEG parameters for the non-sham tDCS and sham tDCS groups.
| Parameters | Non-Sham tDCS Group | Sham tDCS Group |
|---|---|---|
| M (S.D.) | M (S.D.) | |
| Attention | ||
| Pre-test | 4.00 (2.40) | 1.70 (2.07) |
| Post-test | 8.15 (2.66) | 2.62 (2.08) |
| Follow-up | 8.00 (2.38) | 2.52 (2.12) |
| Vowels | ||
| Pre-test | 0.65 (0.54) | 0.46 (1.03) |
| Post-test | 1.92 (1.23) | 0.53 (1.50) |
| Follow-up | 1.66 (0.79) | 0.53 (1.70) |
| Phonemes | ||
| Pre-test | 1.23 (0.99) | 1.15 (0.89) |
| Post-test | 2.60 (1.89) | 1.92 (1.85) |
| Follow-up | 2.36 (1.71) | 1.80 (1.67) |
| Words | ||
| Pre-test | 0.32 (0.54) | 0.15 (0.58) |
| Post-test | 0.80 (1.08) | 0.40 (1.05) |
| Follow-up | 1.00 (1.71) | 0.35 (1.78) |
| Alpha (8–13 Hz) | ||
| Pre-test | 8.60 (1.75) | 8.51 (1.74) |
| Post-test | 9.45 (1.73) | 8.51 (1.73) |
| Follow-up | 8.80 (1.72) | 8.23 (1.73) |
| Beta (14–29 Hz) | ||
| Pre-test | 14.12 (3.60) | 14.02 (3.40) |
| Post-test | 21.43 (3.30) | 16.34 (3.30) |
| Follow-up | 19.71 (3.38) | 14.05 (3.40) |
| Theta (3.5–7 Hz) | ||
| Pre-test | 6.11 (1.90) | 6.01 (1.89) |
| Post-test | 6.22 (1.79) | 6.03 (1.80) |
| Follow-up | 6.18 (1.79) | 6.05 (1.80) |