title: Detecting concealed information using feedback related event-related brain potentials.
abstract: Employing an event-related potential (ERP)-based concealed information test (CIT), the present study investigated (1) the neurocognitive processes when people received feedbacks regarding their deceptive/truthful responses and (2) whether such feedback-related ERP activities can be used to detect concealed information above and beyond the recognition-related P300. During the CIT, participants were presented with rare, meaningful probes (their own names) embedded within a series of frequent yet meaningless irrelevants (others' names). Participants were instructed to deny their recognition of the probes. Critically, following participants' responses, they were provided with feedbacks regarding whether they succeeded or failed in the CIT. Replicating previous ERP-based CITs, we found a larger P300 elicited by probe compared to irrelevant. Regarding feedback-related ERPs, a temporospatial Principle Component Analyses found two ERP components that were not only sensitive to feedback manipulations but also can discriminate probe from irrelevant: an earlier, central-distributed positivity that was elicited by "success" feedbacks peaked around 219ms; and a later, right central-distributed positivity that was also elicited by "success" feedbacks, peaked around 400ms. Importantly, the feedback ERPs were not correlated with P300 that was elicited by probe/irrelevant, suggesting that these two ERPs reflect independent processes underlying memory concealment. These findings illustrate the feasibility and promise of using feedback-related ERPs to detect concealed memory and thus deception.
authors: Department of Psychology, Zhejiang Normal University, Jinhua, China; School of Psychology & Cognitive Science, East China Normal University, Shanghai, China.
authors: Liyang
authors: L
authors: Sai
authors: Department of Psychology, Zhejiang Normal University, Jinhua, China; Bioimaging Core, Faculty of Health Sciences, University of Macau, Taipa, Macau, Macau SAR, China.
authors: Xiaohong
authors: X
authors: Lin
authors: Department of Psychology, Northwestern University, Evanston, USA. Electronic address: xhu@u.northwestern.edu.
authors: Xiaoqing
authors: X
authors: Hu
authors: Department of Psychology, Zhejiang Normal University, Jinhua, China. Electronic address: fugy@zjnu.cn.
authors: Genyue
authors: G
authors: Fu
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D008192:Deception; D018913:Event-Related Potentials, P300; D030141:Feedback, Psychological / Q000502:physiology*; D006801:Humans; D008014:Lie Detection; D008297:Male; D055815:Young Adult
keywords: Conceal information test; Deception detection; Event-related potentials; Feedback processing