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.