4 Discussion
This study examined four different ERP components in the fCIT and examined whether they can be used to detect concealed autobiographical information. We found that: (1) probe stimuli elicited a more negative N200, and positive recognition P300 than irrelevant stimuli in guilty participants, but not in innocent ones; (2) feedback following the probe elicited more positive feedback P300 than feedback following irrelevants in guilty participants, but not in innocent ones; and (3) ROC results showed that combining conflict-monitoring N200, recognition P300 and feedback-P300 yields a high classification efficiency (AUC = 0.96). These findings provide evidence that fCIT can effectively detect concealed autobiographical information.
Based on the correlation results, we observed that the only significant correlation is between FRN and feedback P300 in the guilty group. This can be explained by their shared neural processes related to feedback. Moreover, the absence of correlation among N200, recognition P200, and feedback ERPs indicates that these components likely represent distinct neural processes. Consequently, we have categorized them into conflict-monitoring N200, recognition P300, and feedback ERPs for further discussion.