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The Korean Journal of Cognitve & Biological Psychology - Vol. 31 , No. 2

[ Original Article ]
The Korean Journal of Cognitve & Biological Psychology - Vol. 31, No. 2, pp. 89-107
Abbreviation: KCBPA
ISSN: 1226-9654 (Print)
Print publication date 30 Apr 2019
Received 05 Mar 2019 Revised 22 Apr 2019 Accepted 23 Apr 2019

Equivalent current dipole source localization of deceptive response during crime-relevant sentence processing
Young Youn Kim1,
1Department of Forensic Psychology, Kyonggi University

범죄관련 문장처리동안 속임반응의 등가 전류 쌍극자 뇌 국소화 분석
1경기대학교, 범죄심리학과
Correspondence to : Young Youn Kim, Department of Forensic Psychology, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, South Korea, E-mail:

ⓒ The Korean Society for Cognitive and Biological Psychology
Funding Information ▼


We investigated event-related potential generators in the P300-based guilty knowledge test using Korean sentences, which had an ‘object-complement-verb’ or a ‘subject-object-verb’ structure. Twenty-six participants were divided into a guilty group and an innocent group. Thirteen guilty participants performed a mock theft, and 13 innocent participants committed a crimeless act. During electroencephalogram recording, 3 kinds of stimuli were visually presented: target, probe, which included crime-relevant information, and irrelevant. The results of event-related potentials showed that the P300 amplitude for the probe sentence was larger than the irrelevant sentence in the guilty group; however, the innocent group did not show such difference. The equivalent current dipole analysis for the probe found a group difference of dipole location and power. In both groups, the sources of probe of verb element were determined to be located in the superior frontal gyrus. The guilty participants exhibited significant alterations in the hemispheric asymmetry of dipole power for the probe of verb element. This result seems to reflect that guilty participants have crime-relevant information and pay more attention to the probe compared to the innocent participants. This study also shows hemispheric asymmetry in the deceptive response using sentences.


본 연구는 ‘목적어-보어-서술어(동사)’ 또는 ‘주어-목적어-서술어(동사)’ 구조의 문장을 이용하여 P300-기반 유죄지식검사에서 사건관련전위의 뇌 국소화 분석을 수행하였다. 26명의 실험참가자들은 유죄집단과 무죄집단으로 나뉘어졌다. 13명의 유죄집단은 모의범죄를 저지르고 13명의 무죄집단은 이러한 범죄를 저지르지 않았다. 뇌파를 측정하는 동안 세 가지 자극 유형(목표자극, 탐침자극, 무관련자극)의 문장이 시각적으로 제시되었다. 유죄집단에서 서술어 탐침자극의 P300 진폭이 무관련자극의 P300 진폭보다 크게 나타난 데 반해 무죄집단에서는 이러한 차이가 나타나지 않았다. 탐침자극의 등가 전류 쌍극자 분석은 쌍극자의 위치와 쌍극자의 파워에서 집단 간 차이를 나타냈다. 두 집단 모두 서술어 탐침자극의 뇌 국소화 분석 위치가 상 전두 이랑으로 나타났다. 유죄집단은 서술어 탐침자극의 쌍극자 파워에서 반구 비대칭에 유의미한 변화가 나타났다. 이러한 결과는 유죄집단이 범죄관련 정보를 가지고 있고 무죄집단에 비해 탐침에 주의를 더 기울이는 것을 반영한다. 본 연구는 또한 속임 반응 동안 반구 비대칭을 제시하였다.

Keywords: P300, guilty knowledge test, equivalent current dipole, hemispheric asymmetry, deception
키워드: P300, 유죄지식검사, 등가 전류 쌍극자, 반구 비대칭, 속임


This work was supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea (NRF-2017S1A5A2A01023555)

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