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Detecting concealed information using feedback related event-related brain potentials.

Liyang Sai1, Xiaohong Lin2, Xiaoqing Hu3

  • 1Department of Psychology, Zhejiang Normal University, Jinhua, China; School of Psychology & Cognitive Science, East China Normal University, Shanghai, China.

Brain and Cognition
|July 25, 2014
PubMed
Summary

This study shows that feedback-related brain activity, specifically event-related potentials (ERPs), can detect concealed information. These feedback ERPs offer a novel method for identifying deception beyond traditional recognition signals.

Keywords:
Conceal information testDeception detectionEvent-related potentialsFeedback processing

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Forensic Psychology

Background:

  • Event-related potentials (ERPs) are used in concealed information tests (CITs) to detect deception.
  • The P300 component is a known ERP marker for recognizing stimuli.
  • The role of feedback on deceptive/truthful responses in ERPs remains less understood.

Purpose of the Study:

  • To investigate neurocognitive processes related to feedback on deceptive/truthful responses during a CIT.
  • To determine if feedback-related ERPs can detect concealed information independently of recognition-based ERPs like the P300.

Main Methods:

  • An ERP-based concealed information test (CIT) was employed.
  • Participants denied recognition of meaningful probes (own names) among irrelevant stimuli (others' names).
  • Feedback on CIT success/failure was provided after each response, with subsequent ERP analysis.

Main Results:

  • A larger P300 was observed for probes versus irrelevant stimuli, replicating prior findings.
  • Two novel feedback-sensitive ERP components (peaking ~219ms and ~400ms) distinguished probes from irrelevants following 'success' feedback.
  • These feedback ERPs were uncorrelated with the P300, indicating independent neurocognitive processes.

Conclusions:

  • Feedback-related ERPs show sensitivity to concealed information.
  • These novel ERP components offer a promising, independent neural marker for deception detection.
  • The findings support the utility of feedback-based ERPs for detecting concealed memories.