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  • P-ISSN1226-9654
  • E-ISSN2733-466X
  • KCI

ISSN : 1226-9654

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Vol.22 No.1

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Koffka 고리의 밝기 균질성에 영향을 미치는 두 반 고리의 접촉면의 폭

The effect of width of contacting region of Koffka’s ring on brightness homogeneity

한국심리학회지: 인지 및 생물 / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2010, v.22 no.1, pp.41-58
https://doi.org/10.22172/cogbio.2010.22.1.004
감기택 (강원대학교)
감기택. (2010). Koffka 고리의 밝기 균질성에 영향을 미치는 두 반 고리의 접촉면의 폭. 한국심리학회지: 인지 및 생물, 22(1), 41-58, https://doi.org/10.22172/cogbio.2010.22.1.004

초록

동일한 밝기를 가진 회색 고리의 절반을 각기 다른 밝기를 가진 배경위에 제시하면 각 반 고리의 밝기는 서로 다르게 보이지만, 배경은 그대로 둔 채 두 반 고리를 이어 하나의 고리로 만들면 각 반 고리의 밝기는 균질하게 하나의 밝기를 가지는 것으로 지각된다. Koffka의 고리로 알려진 이 현상에서 고리의 두께가 얇아지게 되면 하나의 고리이지만 배경에 따라 지각되는 밝기는 서로 다르게 지각된다. 본 연구에서는 Koffka 고리의 밝기 균질성이 고리의 두께에 의존적인 현상의 원인을 알아보기 위해서 고리의 두께 변화와 공변하는 두 변인 즉 고리 내부 윤곽의 길이와 두 반 고리의 접촉면의 폭의 효과를 살펴보았다. 실험 결과 고리 내부의 길이는 두 반 고리의 밝기 균질성에 거의 영향을 주지 못하지만, 접촉면의 폭은 유의하게 영향을 주고 있음을 발견하였다. 이러한 결과는 두 반 고리의 밝기 균질성은 각 반 고리에서 발생된 서로 다른 밝기 정보가 섞여서 발생하며, 각기 다른 밝기 정보들이 섞이기 위해서는 일정 수준 이상의 공간적 영역이 필요함을 시사한다.

keywords
Koffka's ring, brightness contrast, the width of contacting region, filling-in, Koffka 고리, 밝기 대비, 접촉면의 폭, 채워넣기

Abstract

A gray ring placed against a black and white background is perceived as uniformly bright unless two half rings are separated, which is known as Koffka's ring. When the width of the ring was narrowed, each half ring was perceived to have different brightness. In the present study, the dependency of uniform brightness on the width of ring was tested by manipulating the length of inner contour of the ring and width of contacting lines between two half rings, which are covaried with the width of Koffka's ring. The results showed that the length of inner contour has little effect, but the brightness of half rings is greatly changed depending on the length of contacting lines. These results suggest that uniform brightness in Koffka's ring would be produced by mixture of the different brightness from each of half rings and a sufficient region might be necessary for brightness spreading.

keywords
Koffka's ring, brightness contrast, the width of contacting region, filling-in, Koffka 고리, 밝기 대비, 접촉면의 폭, 채워넣기

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