Table 4.

Bivariate correlations between changes of self-reported outcome measures and changes of frontal EEG asymmetry for each group and across all participants.

Group	Measures	Δ(F8-F7)	Δ(F4-F3)	Δ(FC4-FC3)	Δ(FC6-FC5)
PPIs (n = 25)	ΔSWB	0.26	0.77**	0.30	0.53**
	ΔCES-D	−0.15	−0.81**	−0.28	−0.34
	ΔSAI	−0.36	−0.54**	−0.12	−0.53**
CG (n = 23)	ΔSWB	0.30	0.05	0.26	0.22
	ΔCES-D	−0.33	−0.26	−0.22	−0.34
	ΔSAI	−0.15	−0.11	−0.14	−0.20
All (n = 48)	ΔSWB	0.33*	0.57**	0.35*	0.29*
	ΔCES-D	−0.32*	−0.61**	−0.29*	−0.34*
	ΔSAI	−0.26	−0.42**	−0.23	−0.27

ΔSWB, ΔCES-D, ΔSAI, Δ(F8-F7), Δ(F4-F3), Δ(FC4-FC3), Δ(FC6-FC5) represent the discrepancy of subjective well-being, depression, anxiety, and frontal alpha EEG asymmetry between the baselines and post-test (T2-T1), respectively.

^*p < 0.05,

^**p < 0.01.