Figure 6
From: (C)overt attention and visual speller design in an ERP-based brain-computer interface
Mean amplitudes for the positive components P1, P2, and P3, and the negative components N1 and N2. Data is depicted separately for the Matrix and the Hex-o-Spell (colored in blue and magenta, respectively), and for overt and covert attention (left and right half of each plot, respectively). Error bars show 1 SEM. Note that the y-axis is reversed for negative components N1 and N2.