Table 1.
Differences in standard alpha band (8 to 12 Hz), individual alpha band relative amplitude and performance tests between protocols.
| M ± SD | ||||
|---|---|---|---|---|
| Control (n = 15) |
Silent Room (n = 15) |
Noisy Room (n = 15) |
p | |
| SAB S1 | NA | 1.57 ± 0.08 | 1.08 ± 0.21 | <0.001 a |
| SAB S12 | NA | 1.51 ± 0.09 | 1.15 ± 0.28 | 0.005 b |
| Difference in SAB (S12–S1) | NA | −0.06 ± 0.06 | 0.07 ± 0. | 0.113 a |
| IAB session 1 | NA | 1.56 ± 0.08 | 1.14 ± 0.26 | <0.001 a |
| IAB session 12 | NA | 1.59 ± 0.12 | 1.21 ± 0.31 | 0.007 b |
| Difference in IAB (S12–S1) | NA | 0.04 ± 0.08 | 0.07 ± 0. | 0.740 b |
| NB pre-test | 96.00 ± 3.87 | 93.67 ± 6.94 | 89.33 ± 9.23 | 0.127 d |
| NB post-test | 96.00 ± 6.32 | 96.33 ± 3.99 | 98.67 ± 8.84 | 0.189 d |
| Difference in NB (post-test–pre-test) | 0.00 ± 0.07 | 2.67 ± 6.78 | 9.33 ± 8.84 | 0.005 c |
| OB pre-test | 94.80 ± 5.28 | 96.27 ± 3.20 | 95.20 ± 3.84 | 0.724 d |
| OB post-test | 96.27 ± 3.01 | 98.40 ± 2.95 | 98.53 ± 1.41 | 0.008 d |
| Difference in OB (post-test–pre-test) | 1.47 ± 2.77 | 2.13 ± 3.58 | 3..33 ± 3.44 | 0.298 c |
M, mean; SD, standard deviation; SAB, standard alpha band; IAB, individual alpha band; S1, session 1; S12, ses-sion12; NB, n-back test; OB, oddball test; NA, Not Applicable. a Differences between groups tested with Student’s t-test. b Differences between groups tested with Mann–Whitney U. c Differences between groups tested with ANOVA. d Differences between groups tested with Kruskal–Wallis Test.