Table 2.
PSD analysis of different frequency bands for two SA groups.
| Frequency band | High SA group | Low SA group | ||||
|---|---|---|---|---|---|---|
| Total power (dB) | Average power (dB) | Power percentage (%) | Total power (dB) | Average power (dB) | Power percentage (%) | |
| δ | 19.23 | 7.54 | 0.01 | 4.12 | 0.62 | 0.01 |
| θ | 52.08 | 46.06 | 36.47 | 39.73 | 33.71 | 20.90 |
| α | 53.16 | 45.38 | 46.78 | 42.58 | 34.80 | 40.25 |
| β | 48.09 | 36.05 | 14.57 | 41.53 | 29.49 | 31.59 |
| γ | 39.84 | 27.05 | 2.18 | 35.13 | 22.35 | 7.25 |
The total power is the total energy value of the band, the average power is the average energy value of the band, and the power percentage is the percentage of the energy value of the band to the total energy value of all bands. It is worth noting that the total power in the table represents the average of the total power of all participants in each group, and the average power similarly represents the average of the average power of all participants in each group. PSD, power spectral density; SA, situation awareness.