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ISSN : 1229-067X

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Vol.32 No.4
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시각적 자극의 정서가와 정서강도에 따른 동공크기 변화

Pupillary Responses as an Indication of Emotional Arousal

한국심리학회지: 일반 / Korean Journal of Psychology: General, (P)1229-067X; (E)2734-1127
2013, v.32 no.4, pp.829-844
맹세호 (가톨릭대학교)
정윤경 (가톨릭대학교)
이중 (국립과학수사연구원)
맹세호, 정윤경, & 이중. (2013). 시각적 자극의 정서가와 정서강도에 따른 동공크기 변화. 한국심리학회지: 일반, 32(4), 829-844.
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초록

동공크기의 변화는 활성화된 심리적 상태, 혹은 정서적 각성을 측정하는데 유용하기 때문에 여러 연구자들에 의해 심리적 활동 과정을 이해하는 지표로 사용되었다. 본 연구는 시각적 자극의 긍정적, 부정적. 중립적 정서가(emotional valence)에 따른 동공크기의 차이를 탐색하고 자극의 객관적, 주관적 정서강도와 동공크기 사이의 관계를 살펴보기 위하여 설계되었다. 이를 위하여 성인 실험참가자 102명(남 28, 여 74)을 대상으로 International Affective Picture System(IAPS: Lang, Bradley, & Cuthbert, 2008)에 의해 평정된 정서자극을 제시하고 동공크기의 변화를 측정하고 각 자극의 강도에 대한 주관적 경험을 보고하도록 하였다. 연구 결과, 정서가에 따라 동공크기의 변화가 유의미한 것으로 나타났다. 사후검증 결과 부정적, 긍정적 정서가를 가진 자극과 중립적 자극 사이의 동공크기는 유의미한 차이를 나타냈으나 긍정적 자극과 부정적 자극 사이의 동공크기 변화는 유의미하지 않았다. 정서강도(객관적/주관적)와 동공크기의 상관분석 결과 자극의 객관적 정서강도와 주관적 정서강도가 동공크기와 정적관계를 가지는 것을 검증하여 정서적 자극에 대한 주관적 경험의 강도가 증가함에 따라 동공의 크기가 확장됨을 확인하였다.

keywords
동공크기, 정서가. 정서강도, 정서적 각성, 자율신경계의 활동, pupillary dilation, emotional valence. emotional intensity, emotional arousal, activation of autonomic nervous system

Abstract

Pupillary dilation has been used for understanding the process of psychological activity by several researchers. The present study was aimed to find difference in pupillary dilation according to emotional valence of visual stimuli and to reveal relationship between emotional intensity and pupillary dilation. 102 subjects’(28 males, 74 females) pupil responses were measured while presenting 10 negative, 10 neutral and 10 positive pictures. The subjects also rated their subjective emotional intensity that they experienced while they were exposed to the stimuli. Our results showed that the amount of pupillary dilation was significantly different according to the valence of emotional stimuli. We found significant difference in pupillary dilation between neutral stimuli and stimuli with emotional valence(negative/positive). But there was no significant difference between positive and negative stimuli. Most importantly, there was significant positive relation between emotional intensity(objective/subjective) and pupillary dilation. These results suggests that pupillary dilation may indicate the level of emotional arousal that a subject experiences.

keywords
동공크기, 정서가. 정서강도, 정서적 각성, 자율신경계의 활동, pupillary dilation, emotional valence. emotional intensity, emotional arousal, activation of autonomic nervous system

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