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ISSN : 1229-0653

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Vol.27 No.2

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거짓 진술의 인지부하가 안구움직임에 미치는 영향

The effect of cognitive load during deception on eye movements

한국심리학회지: 사회 및 성격 / Korean Journal of Social and Personality Psychology, (P)1229-0653;
2013, v.27 no.2, pp.37-49
https://doi.org/10.21193/kjspp.2013.27.2.003
김수진 (중앙대학교)
이장한 (중앙대학교)
김수진, & 이장한. (2013). 거짓 진술의 인지부하가 안구움직임에 미치는 영향. 한국심리학회지: 사회 및 성격, 27(2), 37-49, https://doi.org/10.21193/kjspp.2013.27.2.003

초록

본 연구에서는 거짓말자의 진술조건에 따른 인지부하의 차이가 안구움직임에 미치는 영향을 알아보고자 하였다. 이를 위해 49명의 실험참가자를 거짓 집단(24명)과 진실 집단(25명)으로 나누어 모의범죄를 수행시킨 후, 두 가지 진술조건(거꾸로 말하기, 바로 말하기)에서 진술하는 동안 안구움직임을 측정하였다. 실험 결과, 거짓 집단은 진실 집단에 비해 모든 진술조건에서 도약안구운동의 지속시간이 짧았으며, 바로 말하기 진술조건에서 눈 깜빡임 빈도가 유의미하게 낮았다. 이런 결과는 거짓말 집단에서는 거짓말의 인지부하로 인해 안구움직임은 거의 고정되거나 작은 범위로 움직이고, 눈 깜빡임이 줄어든다는 것을 의미한다. 하지만 상대적으로 높은 인지부하를 경험하는 거꾸로 말하기 진술조건에서는 두 집단 간 안구움직임의 차이는 유의미하지 않았고 바로 말하기 진술조건에 비해 전반적으로 눈 깜빡임과 짧은 시선고정을 자주 보였는데, 이는 인지부하뿐만 아니라 높은 정서불안과 관련이 있어 보인다. 본 연구는 의식적으로 통제가 불가능한 안구움직임을 사용하여 거짓말 탐지를 위한 안구움직임 지표를 탐색하였으며, 바로 말하기 조건으로 거짓말을 할 때 시선의 이동거리가 짧고 눈 깜빡임이 적은 행동을 보이는 것을 확인할 수 있었다.

keywords
거짓말 탐지, 안구움직임, 아이트랙커(Eye-tracker), 거꾸로 말하기, 바로 말하기, Deception, Detecting deception cues, Eye movements, Eye-tracker, Reverse order statement, Detect deception

Abstract

This study examined the eye movements differences between the reverse order and the chronological order statement condition to find out the effective eye movement index for detecting deception. Participants (49 university students) conducted the missions in computer lab. After conduction mock crime, they were randomly allocated to the reverse order or chronological order conditions. Using eye-tracker, we measured the eye movements during statement. Lie group showed shorter saccade duration than truth group at both reverse order and chronological order statement condition. Lie group also showed less blink than truth teller in chronological order state condition. However, there was no difference of eye movements between lie and truth group in reverse order condition. Reverse order group also showed more frequent eye blink and fixation than chronological order group. It was suggested that emotional anxiety during reverse order statement would influence the eye movement. This study found that short saccade duration and less eye blink could be the effective eye movement indexes for the detect deception.

keywords
거짓말 탐지, 안구움직임, 아이트랙커(Eye-tracker), 거꾸로 말하기, 바로 말하기, Deception, Detecting deception cues, Eye movements, Eye-tracker, Reverse order statement, Detect deception

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