Group effect and Condition x Group interaction at P4. a) For each group, the conditions-pooled HEP amplitude is reported (left panel). The vertical area highlighted in cyan corresponds to the time points in which there was a significant main effect for the group (p < 0.05, cluster corrected). b) HEP amplitude (mean ± standard error). Group x Condition interaction at P4 for the time-points in the (304, 336) ms range.