공포와 기쁨 정서 간 안면온도 반응의 차이
Difference of Facial Skin Temperature Responses between Fear and Joy
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초록
많은 연구에서 정서 특정적 생리 반응을 밝히기 위하여 심박률, 혈류량, 피부전도 반응 등의 지표를 사용하였으나, 안면온도를 이용한 정서 연구는 많지 않다. 본 연구는 적외선 열화상을 통해 공포 및 기쁨 자극에 대한 안면온도 변화를 관찰하고자 한다. 98명의 대학생 및 중고생을 대상으로 공포 혹은 기쁨을 유발하는 자극을 제시하기 전과 후의 안면온도를 측정하였다. 온도 값은 이마, 눈앞, 콧등, 코끝, 그리고 뺨에서 추출하였다. 공포 자극을 제시한 조건에서는 콧등과 코끝의 온도가 유의하게 낮아졌다. 기쁨 자극을 제시한 조건에서는 이마, 눈앞의 온도 상승이 유의하였으며, 코끝에서 온도가 유의하게 낮아졌다. 두 조건에서 코의 온도가 유의하게 낮아졌는데, 이는 공포 혹은 기쁨을 경험할 때 각성수준이 증가하여 코 혈관의 혈류량이 감소하여 온도가 낮아진 것으로 볼 수 있다. 공포나 기쁨을 경험할 때 나타나는 온도 변화는 정서를 경험할 때 손가락 온도를 측정한 선행 연구 결과와 일치한다. 이러한 연구 결과는 정서 측정 기법의 개발과, 인간 정서를 탐지하는 컴퓨터 시스템의 기초를 확립하는데 기여하는 바가 있을 것이다.
Abstract
There have been many emotion researches to investigate physiological responses on specific emotions with physiological parameters such as heart rate, blood volume flow, and skin conductance. Very few researches, however, exists by detecting them with facial skin temperature. The purpose of present study was to observe the differences of facial skin temperature by using thermal camera, when participants stimulated by monitor scenes which could evoke fear or joy. There were totally 98 of participants; undergraduate students who were in their adult age and middle, high school students who were in their adolescence. We measured their facial temperature, before and after presenting emotional stimulus to see changes between both times. Temperature values were extracted in these regions; forehead, inner corners of the eyes, bridge of the nose, end of the nose, and cheeks. Temperature values in bridge and end of the nose were significantly decreased in fear emotion stimulated. There was also significant temperature increase in the area of forehead and the inner corners of the eyes, while the temperature value in end of the nose decreased. It showed decrease in both stimulated fear and joy. These results might be described as follows: When arousal level going up, sympathetic nervous activity increases, and in turn it makes blood flow in peripheral vessels under the nose decrease. Facial temperature changes by fear or joy in this study were the same as the previous studies which measured temperature of finger tip, when participants experiencing emotions. Our results may help to develop emotion-measuring techniques and establish computer system bases which are to detect human emotions.
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