After applying this method, PLF was calculated as 1-minus the circular phase angle variance, as described by Tallon-Baudry et al. (Tallon-Baudry et al., 1997). PLF provides a measure of the phase consistency of frequency-specific oscillations with respect to stimulus onset across trials on a millisecond basis. In addition, event-related total power was calculated by averaging the squared single trial magnitude values in each 1 Hz frequency bin on a millisecond basis. The average total power values were 10log10 transformed and then baseline corrected by subtracting the average of the pre-stimulus baseline (−100 to 0 ms) from each time point separately for every frequency. The resulting event-related change in total power values (relative to baseline) are in decibels (dB).
