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KMID : 0389420150230010101
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Korean Journal of Stress Research
2015 Volume.23 No. 1 p.101 ~ p.107
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Study on Difference of P3 Amplitude between Relevant and Irrelevant Stimulus in Concealed Information Test Using Event Related Potential (ERP): Focused on Informed Innocent Group
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홍현기:Hong Hyoen-Gi
김희송:Kim Hee-Song/지형기:Ji Hyung-Ki/김기평:Kim Ki-Pyoung
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Abstract
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The purpose of this study is to investigate the difference in P3 amplitude between relevant questions (RQ) and irrelevant questions (IRQ) during concealed information test using event-related potential. Response difference between guilty group, not-guilty but exposed to crime-related information group, and not-guilty and not exposed to crime-related information group are compared. A total of 126 subjects’ data has been analyzed out of 131 subject data. Data from 5 subjects has been discarded due to inadequacy. Ultimately, in each of the 3 groups, 42 participants are randomly assigned. Result indicated that the P3 amplitude observed in the Fz area showed a significant difference between the RQ and the IRQ among the guilty group. However, remaining groups of the two not-guilty groups did not show a significant difference in all areas of Fz, Pz, and Cz between the RQ and the IRQ regardless of the exposure of the crime-related question. The limitation and the implications are discussed in this article.
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KEYWORD
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Concealed Information test (CIT), Event Related Potential (EPR), Crime-related stimulus, Mock crime task
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