Figure 4. ERP results in Experiment 2.

(A) The grand-average ERPs at Cz, Oz, P7, and P8 elicited by standards (dashed line), emotionally incongruent deviants (bold line), and emotionally congruent deviants (thin line) in negative and negative sequences. The inset shows vMMN, grand average deviant-minus-standard, for emotionally incongruent deviants (bold line) and emotionally congruent deviants (thin line). (B) The topographies of the voltage difference between the standards and the deviants at the peak latencies for each time period. The calculations for the differential ERP waves between standards and deviants were performed within each sequence (i.e., the ERP amplitude for positive standards was subtracted from that for incongruent negative deviants and congruent positive deviants). The images have been flattened into a two-dimensional space using the global interpolation method, which uses all electrodes to calculate values at any given point, viewed from the top of the head.