N200 and P300 as orthogonal and integrable indicators of distinct awareness and recognition processes in memory detection

Xiaoqing Hu*, Narun Pornpattananangkul, Joel P Rosenfeld

*Corresponding author for this work

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

In an event-related potential (ERP)-based concealed information test (CIT), we investigated the effect of manipulated awareness of concealed information on the ERPs. Participants either committed a mock crime or not (guilty vs. innocent) before the CIT, and received feedback regarding either specific (high awareness) or general (low awareness) task performance during the CIT. We found that awareness and recognition of the crime-relevant information differentially influenced the frontal-central N200 and parietal P300: Probe elicited a larger N200 than irrelevant only when guilty participants were in the high awareness condition, whereas the P300 was mainly responsive to information recognition. No N200-P300 correlation was found, allowing for a combined measure of both yielding the highest detection efficiency in the high awareness group (AUC=91). Finally, a color-naming Stroop task following the CIT revealed that guilty participants showed larger interference effects than innocent participants, suggesting that the former expended more attentional resources during the CIT.

Original languageEnglish (US)
Pages (from-to)454-464
Number of pages11
JournalPsychophysiology
Volume50
Issue number5
DOIs
StatePublished - Jan 1 2013

Keywords

  • Complex trial protocol
  • Concealed information test
  • Ego depletion
  • Event-related brain potentials
  • Memory detection
  • N200
  • P300
  • Response monitoring
  • Stroop task

ASJC Scopus subject areas

  • Physiology
  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Physiology (medical)

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