3.5 Correlations between N200, recognition-P300 and feedback-ERPs
To explore the neural activity difference between the recognition phase (probe vs. irrelevant) and the feedback phase (success vs. failure following probe and irrelevant), we compute the Pearson’s correlation in both guilty and innocent participants. Specifically, the difference scores (probe minus irrelevant) for the N200, recognition-P300, FRN and feedback-P300 were calculated. Since our main purpose is to distinguish between probe and irrelevants, the FRN and feedback-P300 were collapsed across successes and failures. Results showed that among guilty participants, there were no correlations between recognition components and feedback components: rs (30) = -0.26 - 0.29, ps > 0.12. The correlation between FRN and feedback P300 was also significant, r (30) = 0.56, p = 0.001 (for detailed statistical results, see Table 2). The innocent group did not show any significant correlations between ERP activities (rs < 0.33, ps > 0.08; for detailed statistical results, see Table 3). The correlation between P200 and other ERP components can be found in the supplementary materials (see Table S2).