- P-ISSN1226-9654
- E-ISSN2733-466X
- KCI
얼굴이모티콘 처리에 대한 역전효과: ERP 연구
Inversion Effects on Face Emoticon Processing: An ERP Study
양예은 (전남대학교 심리학과)
김정희 (전남대학교)
초록
이모티콘은 온라인과 오프라인 소통에서 폭넓게 사용되고 있다. 얼굴이모티콘의 지각적 부호화가 얼굴-특수 구성적 처리에 의존하는지 밝히기 위해 자극 역전이 ERP성분 N170과 P1의 진폭과 정점 잠재기에 미치는 영향을 조사하였는데, N170은 얼굴에 민감하고 정위상 바른 얼굴보다 역전된 얼굴에 대해 진폭이 더 크고 잠재기가 더 지연되지만(N170-얼굴역전효과) P1은 저수준 시각적 속성에 민감한 것으로 알려져 있다. 얼굴이모티콘, 얼굴사진, 그리고 집아이콘을 정위상 바르게 또는 역전시켜 제시하고서 자극 윤곽선상 두 개 틈의 상대적 높이를 판단하도록 참가자에게 요구했다. N170과 P1의 평균진폭과 정점 잠재기를 분석한 결과는 다음과 같다. N170 진폭에 있어 얼굴이모티콘은 얼굴사진과 차이가 없었고, 두 얼굴유형 모두 집아이콘보다 더 부적이었으며(얼굴-민감 N170효과), 역전 정위와 바른 정위의 차이(역전효과)가 모든 자극유형에서 관찰되지 않았다. N170 정점 잠재기에 있어 얼굴이모티콘은 얼굴사진보다 더 짧았고 집아이콘과 차이가 없었는데, 이러한 잠재기상 차이는 역전 정위에서만 관찰되었다. N170 정점 잠재기와 관련된 역전효과가 두 얼굴유형 모두에서 관찰되었고(N170-얼굴역전효과) 집아이콘에서는 관찰되지 않았지만, 역전효과의 크기에 있어서는 얼굴사진이 얼굴이모티콘보다 더 컸고 얼굴이모티콘은 집아이콘과 차이가 없었다. P1의 진폭과 정점 잠재기는 얼굴-민감효과나 얼굴역전효과를 보이지 않았으며, 단지 자극들간 저수준 시각적 차이의 효과만을 보였다. 이러한 결과는 얼굴이모티콘의 지각적 부호화가 얼굴-민감 구성적 처리기전에 다소 의존하지만, 구성적 처리가 방해받는 역전 정위의 경우에는 집아이콘과 같이 사물-민감 지각기전에 주로 의존한다는 것을 시사한다.
- keywords
- face emoticon, face inversion effect (FIE), face-sensitive effect, N170, P1, 얼굴이모티콘, 얼굴역전효과, 얼굴-민감효과, N170, P1
Abstract
Emoticons are widely used for various offline and online communication. To investigate whether the perceptual encoding of face emoticon relies on the face-specific configural processing, we examined how stimulus inversion affects the amplitude and peak latency of face-sensitive ERP component N170 which is known to be larger and delayed in response to inverted than to upright human face (N170-face inversion effect; N170-FIE) as well as ERP component P1 which is known to be sensitive to low-level visual features. ERPs were recorded to upright and inverted face emoticons, face photos, and house icons which were surrounded by oval-shaped outline. Participants had to judge the relative height of two gaps on the outline. N170 was enhanced for face emoticons and face photos relative to house icons (face-sensitive N170 effect), and showed no amplitude difference between face emoticons and face photos. N170 amplitude was not affected by inversion for all types of experimental stimuli. N170 was delayed for face photos relative to face emoticons as well as house icons, and showed no latency difference between face emoticons and house icons. The aforesaid latency difference among experimental stimuli were found only for inverted stimuli. For face emoticons and face photos, N170 was delayed for inverted relative to upright faces (N170-FIE), but, no N170 peak latency-related inversion effect was found for house icons. However, the magnitude of inversion effect was largest for face photos, and showed no difference between face emoticons and house icons. The amplitude and peak latency of P1 showed neither face-sensitive effect nor FIE, and only showed the effect of low-level visual differences among experimental stimuli. These findings show that perceptual encoding of upright face emoticons can rely on face-sensitive configural processing mechanisms to a less degree than face photos, but perceptual encoding of inverted face emoticons can rely on object-sensitive perceptual mechanisms like house icons.
- keywords
- face emoticon, face inversion effect (FIE), face-sensitive effect, N170, P1, 얼굴이모티콘, 얼굴역전효과, 얼굴-민감효과, N170, P1
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