Table 3.
Results of the relative theta (RT) and relative high beta (RHB) power spectrum according to electroencephalography (EEG).
| EEG | Activity | RT 1 | RHB 2 | ||
|---|---|---|---|---|---|
| O1 3 | O2 4 | O1 | O2 | ||
| Mean ± SD 5 | |||||
| Total (N = 30) |
No plants | 0.16 ± 0.04 b 7 | 0.17 ± 0.04 b | 0.19 ± 0.02 a | 0.19 ± 0.02 |
| A photograph of plants | 0.18 ± 0.04 ab | 0.18 ± 0.03 ab | 0.19 ± 0.02 a | 0.18 ± 0.02 | |
| Real plants | 0.20 ± 0.06 a | 0.19 ± 0.04 a | 0.17 ± 0.02 b | 0.18 ± 0.02 | |
| Artificial plants | 0.19 ± 0.04 ab | 0.19 ± 0.04 a | 0.18 ± 0.02 ab | 0.18 ± 0.02 | |
| P 6 | 0.015 * | 0.017 * | 0.015 * | 0.226 NS | |
1 RT power spectrum was calculated by (theta (4 to 8 Hz) power)/(total frequency (4 to 50 Hz) power). 2 RHB power spectrum was calculated by (high beta (20 to 30 Hz) power)/(total frequency (4 to 50 Hz) power). 3 O1 = left occipital lobe 4 O2 = right occipital lobe. 5 Standard deviation. 6 Statistical significance as determined using one-way analysis of variance. NS = Nonsignificant, * p < 0.05 by one-way analysis of variance. 7 Post hoc analysis: a > b according to Duncan’s multiple range tests.