심박변이도 분석을 이용한 정서표현양가성에 따른 스트레스 반응성 연구
Stress Responses by Ambivalence over Emotional Expression Based on Heart Rate Variability Analysis
민경환 (서울대학교)
이동귀 (연세대학교)
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초록
정서표현양가성에서의 개인차가 스트레스 조건에서 자율신경활동에 영향을 미치는지 심박변이도분석을 사용하여 검증하였다. 정서표현양가성 평균에서 상하 1표준편차 이상 떨어진 점수를 기준으로 정서표현양가성 고저집단을 각 15명씩(남16, 여 14; 평균 연령 22.9세, SD=2.8) 구성하여, 실험 과제를 수행하는 ‘약한 스트레스 조건’과 부정적인 수행결과 피드백을 받는 ‘강한 스트레스 조건’에서 각 집단의 자율신경 활동양상을 비교하였다. 정서표현양가성이 높은 사람들은 낮은 사람들에 비해 약한 스트레스 조건에서 교감신경활동이 유의하게 더 증가하였다. 강한 스트레스 조건에서는 두 집단 모두 교감신경활동이 우세하여 집단차는 유의하지 않았다. 피험자 내 효과 검증결과 정서표현양가성 수준과 교감신경활동 변화의 상호작용이 유의하였다. 이는 정서표현양가성이 낮은 사람들은 자기개념을 위협하는 분명한 스트레스 자극에만 탄력적으로 반응하는 반면, 정서표현양가성이 높은 사람들은 분명한 스트레스 자극뿐 아니라 정서표현양가성이 낮은 사람들은스트레스로 받아들이지 않는 약한 자극에도 스트레스 반응을 나타냄을 시사한다.
- keywords
- Ambivalence over Emotional Expression, Heart Rate Variability, Stress, Autonomic Underpinnings, 정서표현양가성, 심박변이도, 스트레스, 자율신경
Abstract
To clarify the relationship between individual differences in Ambivalence over Emotional Expression (AE) and autonomic responses in stressful conditions, we used heart rate variability analysis. The participants included 30 normal college students (16 male, 14 female;mean age of 22.9 years) divided into the high and low AE groups based on their AE scores 1standard deviation apart from the mean. The continuous interplay between sympathetic and parasympathetic influences on heart rate under the weak stressor condition (participating in an experiment test) and the strong stressor condition (getting negative performance feedback)was measured to test group differences. Only high AE group showed increased sympathetic activity (LF) under the weak stressor condition, while both groups showed dominant sympathetic influence under the strong stressor condition without a significant group difference. Within subject test result showed a significant interaction effect between the group variable and LF changes. The result indicates that the low AE people showed flexible responses only to an clear stressor that may threat one's self-concept. On the other hand, the high AE people sensitively reacts with increased sympathetic activity not only to the strong stressors but also to the weak stressor, an evaluative situation where the others did not take it as a stressor.
- keywords
- Ambivalence over Emotional Expression, Heart Rate Variability, Stress, Autonomic Underpinnings, 정서표현양가성, 심박변이도, 스트레스, 자율신경
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