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개인의 주의조절 수준에 따른 정서정보처리를 위한 뇌활동의 차이

Individual Differences in the Brain Activation for Emotional Processing by Attentional Control

한국심리학회지: 일반 / Korean Journal of Psychology: General, (P)1229-067X; (E)2734-1127
2009, v.28 no.1, pp.83-101
이강희 (고려대학교)
윤선아 (국제뇌교육종합대학원대학교)
이태호 (육군사관학교)
김기성 (락싸기술연구소)
김현택 (고려대학교)
  • 다운로드 수
  • 조회수

초록

정서 정보는 그것을 받아들이는 개인의 성격에 따라 상당히 다르게 해석된다. 본 연구에서는 개인의 주의조절 수준이 예상하지 못한 정서자극 처리와 관련한 뇌활동에서 나타내는 차이를 확인하고자 하였다. 이를 위해 정서 일탈자극을 포함한 세자극 오드볼 패러다임을 사용하여 사건관련전위(event-related potentials: ERPs)를 측정하였다. 실험참가자들을 주의조절의 상/하 수준에 따라 두 그룹으로 분류한 후 도형의 크기에 대해 반응하는 단순변별과제를 수행하도록 하였다. 과제 수행 중에는 낮은 빈도로 과제와 관련이 없고 지각적 현저성이 높은 위협자극이나 중성자극이 제시되었다. 주의조절 상/하의 두 집단은 두 종류의 일탈자극에 대해 유의하게 큰 진폭을 가지는 N2와 P3a 반응을 나타냈다. P3b의 반응에 있어서, 높은 주의조절 집단은 중성일탈자극보다 위협일탈자극에 대해 더 큰 진폭을 나타냈으나, 낮은 주의조절 집단에서는 이러한 차이가 확인되지 않았다. 본 연구의 결과는 개인의 주의조절 수준에 따라 정서정보의 처리와 관련한 뇌활동에서 차이를 보이며, 이러한 차이가 정서정보와 관련한 맥락을 형성하거나 새로운 기억을 형성하는 단계에서 영향을 미침을 보여준다.

keywords
주의조절, 개인차, 사건관련전위, N2, P3a/b, attentional control, individual difference, event-related potential, N2, P3a/b

Abstract

The main objective of the present study is to investigate whether individual differences in attentional control can modulate orienting response to unexpected emotional stimuli. Event-related potentials(ERPs) were recorded during a visual three-stimulus oddball paradigm. According to the score of Attentional Control Questionnaire(ACQ), the participants were divided into high or low attentional control(AC) groups. Simple geometric figures served as standard or target stimuli, and threat or neutral pictures as deviant emotional stimuli. Participants performed a perceptually difficult standard/target discrimination task with which deviant emotional stimuli were presented infrequently. Both AC groups showed a significantly larger amplitude at the anterior area in N2 and P3a to threat and neutral stimuli. In the result of P3b, the high AC group showed a larger amplitude to threat stimulus than to neutral stimulus. However, there was no significant difference of P3b amplitude in the low AC group. These results suggest that the attentional control of individual modulates emotion-related brain activation at the processing of context or memory update.

keywords
주의조절, 개인차, 사건관련전위, N2, P3a/b, attentional control, individual difference, event-related potential, N2, P3a/b

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한국심리학회지: 일반