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ISSN : 1229-0653

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Vol.29 No.2
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자극간 제시간격이 짧은 P300 숨긴정보검사에서 대응수단의 영향

Effects of Countermeasures on P300-based Concealed Information Test with Short Inter-Stimulus Interval

한국심리학회지: 사회 및 성격 / Korean Journal of Social and Personality Psychology, (P)1229-0653;
2015, v.29 no.2, pp.91-108
https://doi.org/10.21193/kjspp.2015.29.2.006
이민희 (충북대학교)
엄진섭 (충북대학교)
음영지 (충남대학교)
손진훈 (충남대학교)
이민희, 엄진섭, 음영지, & 손진훈. (2015). 자극간 제시간격이 짧은 P300 숨긴정보검사에서 대응수단의 영향. 한국심리학회지: 사회 및 성격, 29(2), 91-108, https://doi.org/10.21193/kjspp.2015.29.2.006
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초록

본 연구에서는 관련자극이 한 개이고 자극간 제시간격이 1초인 P300 숨긴정보검사(P300 CIT)가 부분 매칭 대응수단에 영향을 받는지 검증하였으며, 대응수단의 사용을 탐지할 수 있는 방법을 탐색하였다. 네 개의 무관련자극 중 하나의 무관련자극에 특정 반응을 하는 조건(1CM 조건)과 두 개의 무관련자극에 특정 반응을 하는 조건(2CM 조건)에서 대응수단의 효과를 검증하였다. 각 조건에서 손가락 또는 발가락을 움직이는 물리적 대응수단과 마음속으로 어머니 또는 아버지의 이름을 부르는 정신적 대응수단을 사용하였다. 실험결과, 물리적 대응수단과 정신적 대응수단은 모두 P300 CIT의 결과에 큰 영향을 미치는 것으로 나타났다. 대응수단을 사용하지 않은 경우에 P300 CIT의 정확탐지율은 71%였던 반면, 물리적 대응수단을 사용한 경우에는 1CM 조건과 2CM 조건의 정확탐지율은 각각 0%와 14%였으며, 정신적 대응수단을 사용한 경우에는 1CM 조건과 2CM 조건의 정확탐지율이 모두 14%였다. ERP들 간의 상관계수로 대응수단의 탐지가능성을 평가하였다. 거짓을 말하였으나 거짓을 말하지 않은 것으로 잘못 판단된 사례들을 대상으로, 무관련자극의 ERP와 관련자극의 ERP 간 상관계수가 무관련자극의 ERP와 목표자극의 ERP 간 상관계수보다 더 큰지 확인하였다. 물리적 대응수단집단의 100%와 정신적 대응수단집단의 92%가 이러한 경우에 해당한 반면에 단순유죄집단은 33%만 이러한 양상을 보였다. ERP간 상관계수를 이용한 대응수단 사용의 탐지가능성을 논의하였다.

keywords
P300, 숨긴정보검사, 거짓말탐지, 대응수단, P300, Concealed information test, Lie detection, Countermeasure

Abstract

This study was to test whether P300 CIT, which has one prove and 1s inter-stimulus interval affected by countermeasures. Also, it was to investigate the method for the detection of countermeasure. The effect of countermeasures was tested under the condition where the participants were asked to respond to a particular irrelevant (1CM condition) and respond to two particular irrelevants (2CM condition) out of four irrelevants. We used both physical countermeasure whether the participants were required to wiggling their fingers or toes and mental countermeasure whether the participants were required to calling his or her mother's name in mind. The results showed the use of physical and mental countermeasures influence on the detection rate in P300 CIT. When the countermeasures were not used, the detection rate was 73% in P300 CIT. The detection rate was 0 % and 14 % in 1CM condition and 2 CM condition respectively, when the physical countermeasures were used. The detection rate was 14% both in 1CM condition and 2 CM condition when the mental countermeasures were used. The detectability of the countermeasures was evaluated from correlation coefficients among ERPs. We tested whether the correlation coefficients between ERPs from irrelevant and target were greater than the correlation coefficients between ERPs from irrelevant and probe for the cases incorrectly evaluated as not lying. One hundred percent in the group of physical countermeasure and 92% in the group of mental countermeasure were included while 33% in the group of guilt were included in the criteria. The possibility for the detection of countermeasure by using correlation coefficients among ERPs was discussed.

keywords
P300, 숨긴정보검사, 거짓말탐지, 대응수단, P300, Concealed information test, Lie detection, Countermeasure

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