The N2 and P3 activation in each experimental condition.

<p>N2 amplitude in the SSHSS condition > the HHHHH condition and the SSHSS condition > the XXHXX condition. P3 amplitude in the HHSHH condition > the SSSSS condition.</p

The stimulus samples (Due to the privacy rights, would the reader please note that the present pictures were not the stimuli used in the experiment The model in the sample pictures agreed to publish his pictures in the journal and his agreement file had been sent to the Journal Office of PLOS ONE.)

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0069683#pone-0069683-g002" target="_blank">Figure 2A</a> showed the stimulus sample for HHHHH, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0069683#pone-0069683-g002" target="_blank">Figure 2B</a> for SSHSS, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0069683#pone-0069683-g002" target="_blank">Figure 2C</a> for NNHNN, and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0069683#pone-0069683-g002" target="_blank">Figure 2D</a> for XXHXX.</p