0.0167) or significant group × region effects in the theta, beta, or gamma bands (all P-values > 0.0167). Interhemispheric coherence without controlling for the effects of the psychological characteristics Analyses of interhemispheric coherence while controlling for the effects of the demographic variables but not the psychological variables revealed that there were no significant group or group × region effects for the delta, theta, alpha, beta, or gamma bands (all P-values > 0.0167). Coherence while controlling for the effects of the psychological characteristics Figure 2 presents overall features of the estimated Ms of coherence at individual EEG electrode pairs in each frequency band for the three groups while controlling for the effects of the psychological variables.Figure 2Coherence with controlling effects of psychological covariates. The lines represent estimated coherence means of the groups by GEE at each location for the (a) delta, (b) theta, (c) alpha, (d) beta, and (e) gamma bands. Both effects of demographic data (age, education, and IQ) and psychological data (scores on the BDI-II, BAI, and BIS-11) were controlled in analyses. The meaning of bar scales ranging from −0.5 (blue) to 0.5 (red). Fisher’s Z-transformed scores were used for the EEG data. IGD = Internet gaming disorder; AUD
