Once evoked energy (hereinafter denoted with “EVK”) and PLF (“PLF”) were computed for each subject-electrode, measures were baseline corrected within frequency-band by subtracting the pre-stimulus mean (Aviyente et al., 2011; Spencer et al., 2004) within a −1000 and −1 millisecond window to adequately baseline-correct frequencies as low as one hertz (Roach and Mathalon, 2008). Component scores were extracted as mean values within delta (1 – 3.5 Hz) and theta (3.5 – 8 Hz) bands spanning the window of 300 to 600 milliseconds (encapsulating the P3 peak in these data) following stimulus-onset. We chose only these frequencies because delta and theta are most prominent in P3 (Basar et al., 1999; Bernat et al., 2007; Karakas et al., 2000); their boundary was chosen by “splitting the difference” between commonly-used cutoffs ranging between three and four hertz.
