- P-ISSN1226-9654
- E-ISSN2733-466X
- KCI
정신병질 경향성집단에서의 정서인식: 시각적 Oddball 과제를 이용한 사건관련전위연구
Emotional Recognition in Individuals with Psychopathic Tendencies during Visual Oddball Tasks: An Event-Related Potentials Study
김영윤 (경기대학교)
김범준 (경기대학교)
초록
본 연구는 사건관련전위를 이용하여 정신병질 경향성을 가진 사람들이 정서인식에 결함을 보이는지 알아보기 위해 수행되었다. 정신병질적 성격 질문지 개정판(이수정, 박혜영, 공정식, 2007)에 의해 65점 이상을 받아 정신병질 경향성집단으로 분류된 20명이 실험집단으로 선발되었으며 정신병질적 성격 질문지 개정판에서 65점 이하를 받은 나머지 학생들 중에서 20명이 통제집단으로 선발되었다. 총 두 가지 oddball 과제가 수행되었는데, 본 연구에 사용된 oddball 과제는 빈번하게 나타나는 표준자극들 중에서 드물게 나타나는 두 종류의 목표자극을 변별하도록 설계되었다. 실험참가자들은 목표자극이 나타났을 때 가능한 빠르고 정확하게 해당되는 버튼을 누르도록 지시 받았다. 목표자극으로 과제 1에서 공포와 슬픔의 정서를 나타내는 얼굴표정이 사용되었고, 과제 2에서는 행복과 슬픔의 정서를 나타내는 얼굴표정이 사용되었다. 표준자극으로는 중성적인 얼굴표정이 모든 과제에서 사용되었다. 정신병질 경향성집단과 통제집단 모두 공포 표정이 슬픔 표정보다 과제수행 정확도가 통계적으로 유의미하게 낮게 나타났다. 그리고 정신병질 경향성집단은 공포 표정에서 슬픔 표정보다 느리게 반응하는 경향성을 보였다. 두 집단 모두 표준자극에 비해 두 종류의 목표자극에서 유발된 P300이 400-600 ms의 시간영역에서 두정부에서 가장 큰 진폭으로 나타났다. 목표자극에 의해 유발된 P300에서의 진폭이나 잠재기가 집단 간에 차이가 없는 것으로 나타났고, 정서 간에도 차이가 없었다. 정신병질 경향성집단은 통제집단과는 달리 뇌의 전두 영역에서 공포 표정의 P300이 슬픔 표정 보다 큰 진폭을 보이는 경향성을 보여주었다. 이러한 결과는 정신병질자들의 정서인식 결함이 정신병질 경향성을 가진 대학생들에서는 매우 약하게 나타난다는 것을 보여준다.
- keywords
- Emotional recognition, Psychopathic tendency, Event-related Potentials, visual oddball tasks, P300, 사건관련전위, 정신병질 경향성, 정서인식, oddball 과제, P300
Abstract
The present study investigated emotional recognition in subjects with psychopathic tendency using event-related potentials. On the basis of the Psychopathic Personality Inventory-Revised(Lee et al., 2007), undergraduate students were divided into psychopathic tendency(n=20) and control(n=20) groups. Task 1 and Task 2 were visual oddball tasks of emotional recognition. In all tasks, standard stimuli were neutral facial expressions. Target stimuli of Task 1 were fear and sad facial expressions and target stimuli of Task 2 were happy and sad facial expressions. Subjects were required to press the button whenever the presented stimuli were emotional facial expressions. Both groups showed significantly lower accuracies in the fear stimuli than the sad stimuli. The psychopathic tendency group exhibited slower reaction time in the fear stimuli than the sad stimuli. In Task 1 and Task 2, both groups showed that P300 component was elicited by the target stimuli at the parietal sites for 400-600 ms. There were no significant differences in the amplitude and latency of P300 between groups and stimuli condition of emotion. However, in the psychopathic tendency group, P300 elicited by fear stimuli revealed greater amplitude than sad stimuli at frontal electrode sites. This pattern of P300 amplitude difference was not observed in the control group. These results indicate that undergraduate students with psychopathic tendencies exhibit weak emotional recognition deficits.
- keywords
- Emotional recognition, Psychopathic tendency, Event-related Potentials, visual oddball tasks, P300, 사건관련전위, 정신병질 경향성, 정서인식, oddball 과제, P300
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