the ERP peak or the median of single-trials (all t < 1. all p > 0.4). Figures 3D,E illustrate P1 amplitude when calculated as the peak of the ERP (Figure 3D) and the median amplitude of the single-trial peaks (Figure 3E). In addition these figures show variability as the SD of the single-trial peaks (3D) and the MAD of the single-trial peaks (3E). For comparison with previously published data, data from the raw EEG is presented in order to illustrate the difference in amplitude when calculated from the ERP and from the median of the single-trials.
