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N 200 and P 300 as orthogonal and integrable indicators of distinct awareness and recognition processes in memory detection
Author(s) -
Hu Xiaoqing,
Pornpattananangkul Narun,
Rosenfeld J. Peter
Publication year - 2013
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/psyp.12018
Subject(s) - psychology , stroop effect , recognition memory , task (project management) , event related potential , cognitive psychology , social psychology , cognition , neuroscience , economics , management
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 N 200 and parietal P 300: Probe elicited a larger N 200 than irrelevant only when guilty participants were in the high awareness condition, whereas the P 300 was mainly responsive to information recognition. No N 200‐ P 300 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 .