highly significantp < 0.001
3 , we observed a highly significant spectral power peak at 10.2 Hz ( p < 0.001, p = 0.004 when time course, not trial ID, was shuffled; norm. spectral amplitude = 3.47: 95%-CI of the surrogate distribution obtained by shuffling the n −1-SOA labels across trials = [−1.38 2.51]; spectral powers exceeding the upper limit of this CI were deemed significant).