The comparison between active and passive conditions significantly interacted with Voice, t (98) = 2.42, p =.02, d = 0.24, the interaction with group approached significance, t (98) = 1.87, p =.06, d = 0.19, but the three-way interaction was not significant, t (98) = 1.62, p =.11, d = 0.16.
In summary, N1 suppression was evident in both groups and in both Voice conditions individually, but there was evidence that the degree of suppression was larger in the unaltered voice condition than the pitch-shift condition, and a marginally significant effect indicating greater suppression in the control group than in patients. 3.1 Phase coherence Turning to phase coherence, there were significant main effects of group, F( 1, 49) = 22.32, p =.001, η P 2 = 0.31, and Voice, F (1, 49) = 5.13, p =.03, η P 2 = 0.10.