Table 3.
Comparison of mean values of R-R intervals and brainwaves before and after the Trier Social Stress Test (TSST).
| Parameter | Pre | Post | t | p | Cohen’s d |
|---|---|---|---|---|---|
| R-R interval | 0.828 ± 0.012 | 0.712 ± 0.010 | 15.161 | 0.000 ** | 1.029 |
| Low alpha | 26,078.684 ± 903.091 | 21,963.362 ± 1488.589 | 2.718 | 0.008 ** | 0.345 |
| High alpha | 30,033.950 ± 2079.774 | 19,874.067 ± 666.362 | 4.850 | 0.000 ** | 0.679 |
| Low beta | 9148.347 ± 684.498 | 15,835.987 ± 542.500 | −10.194 | 0.000 ** | 1.117 |
| High beta | 7727.177 ± 508.102 | 14,721.790 ± 565.273 | −11.479 | 0.000 ** | 1.342 |
N = 150, mean ± SEM. ** p < 0.01, paired-sample t-test.