highly significantp < 0.00001
On these grand-averaged data, a Z-Score computed as the difference between amplitude at the frequency of interest and the mean amplitude of 20 surrounding bins divided by the standard deviation of the 20 surrounding bins (e.g., Rossion et al., 2012 ; Liu-Shuang et al., 2014 ; see also ‘Materials and methods’) was highly significant at electrode Oz (Z = 52.9, p < 0.00001).