ISSN : 1226-9654
본 연구에서는 얼굴에 대한 공간 주파수 처리가 표정 인식 및 연령 지각에 어떤 영향을 주는지를 살펴보았다. 고주파수 정보와 저주파수 정보 각각이 표정 인식 및 연령 지각에 미치는 효과를 비교하기 위해 두 개의 실험이 수행되었다. 실험 1에서는 쾌-불쾌, 각성-이완의 2차원 정서 공간상에서 대표적인 여덟 개의 표정이 추출, 사용되었고, 실험 2에서는 20대부터 60대까지의 여성 얼굴이 사용되었다. 공간 주파수 필터링은 Vuilleumier, Armony, Driver, 그리고 Dolan(2003)의 연구에 준하여 실시하였다. 실험 결과 표정 인식에서는 쾌-불쾌 차원과 각성-이완 차원 모두에서 고주파수 정보가 저주파수 정보보다 상대적으로 더 중요한 역할을 하는 것으로 나타났다. 연령 지각에서는 저주파수와 고주파수 필터링 모두 고 연령대의 얼굴에 대한 연령 지각에 특히 영향을 미치는 것으로 나타났다. 이러한 결과는 연령 지각이 얼굴 처리에서 변화 가능한 속성을 처리하는 경로와 불변속성을 처리하는 경로 모두와 관련될 가능성이 있음을 시사한다.
In this study, we investigated the effect of spatial frequency filtering on facial expression recognition and age perception. Two experiments were performed to compare the relative importance of high spatial frequency information with low spatial frequency information on facial information processing. In the first experiment, the stimuli were made from eight images of facial expressions which were located on the 2-dimensional space of emotion: pleasure-displeasure and arousal-relaxation. In the second experiment, the images used stimuli were the female faces from twenties to sixties. The spatial frequency filtering of facial stimuli were similar to Vuilleumier, Armony, Driver, & Dolan(2003)'s. The results showed that the high spatial frequency information are more decisive than low spatial frequency information in the estimation of the facial expressions on both pleasure and arousal dimensions, and both high and low frequency information are concerned with the estimation of age for the old groups. These results imply that the age perception is related to both pathways of changeable information processing and invariant information processing on the face.
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