Unveiling the efficacy of subdividing the P300 in distinguishing perpetrator identity in the concealed information test

The Concealed Information Test (CIT) is a widely utilized method for detecting deception, often relying on the P300 component, which is notably sensitive when elicited by guilty individuals. Despite its established sensitivity, there is a paucity of research exploring the CIT's effectiveness in identifying conflicted criminals and enhancing the ecological validity of the CIT paradigm. This study posits that the roles of different P300 subcomponents in deception detection vary significantly. We hypothesize that analyzing these P300 subcomponents can more effectively distinguish the identities of different identities. The participants in the guilty and the conflict groups were instructed to have hushed conversations about theft to simulate the criminal process. Subsequently, they completed the CIT. The findings indicate that holistic P300 was insufficient for differentiating between identities. In contrast, the analysis of P300 subcomponents provided precise differentiation and better individual discrimination rate. This study underscores the efficacy of examining P300 subcomponents in distinguishing among different groups of individuals.