The mediation models explained between 15% (F2;33 = 3.96; p < 0.05; Fig. 3 Model 3) and 20% (F2;33 = 5.31; p < 0.01; Fig. 3 Model 2) of the data variability. All mediation models indicated that the total effect of TAS-20 on EEG functional connectivity values was significant (b = −0.01; p < 0.01), with more severe alexithymia associated with a greater decrease in EEG functional connectivity value. Moreover, the relationship between alexithymia and EEG functional connectivity data was directed and was not mediated by psychopathology severity [b between 0.001 (p = 0.92) and 0.002 (p = 0.69)]. Finally, in all mediational models no significant direct effect was observed for GSI on EEG functional connectivity values (Fig. 3). Detailed statistics of the mediational models are listed in Table 5.
