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. 2019 Dec 24;17(1):148. doi: 10.3390/ijerph17010148

Figure 4.

Figure 4

Comparison of mean values of (a) low alpha, (b) high alpha, (c) low beta, and (d) high beta brainwaves in different scenes. N = 30, mean ± SEM. * p < 0.05, ** p < 0.01, paired sample t-test.