• 한국정밀공학회지
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• 제24권10호
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• pp.131-136
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• 2007

In this paper, we estimated the effects of different color stimulation on the cognitive function of human quantitatively. For the stimulations we used color lights with 6 color filters such as red, yellow, green, blue, violet and white. The experiment was performed in a soundproof chamber. 50 young male and female subjects were participated in the experiment. To find the appropriate color cognitive function, the endogenous visuospatial attention task(EVAT) and one back working memory task(OWMT) were performed. The reaction time and accuracy degree were measured. The results showed that the reaction time of EVAT was the fastest and the accuracy degree of attention task was the highest in green environment. The reaction time of OWMT was the fastest in yellow and the accuracy degree of memory task was the highest in blue. For physiological parameters, we measured electrocardiogram(ECG) and HRV spectrum analysis, HF/LF color environment. These results can be used as an indicator in the design of color environment and clinical applications.

• 감성과학
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• 제7권4호
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• pp.51-56
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• 2004

본 연구의 목적은 각각의 색채 자극 하에서의 생리신호를 측정하고자 하였다. 실험에 사용된 색채는 빨강, 노랑, 녹색, 파랑, 보라, 그리고 백색을 사용하였다. 실험은 방음 암실에서 이루어졌으며, 건강한 성인 남, 여 30명을 대상으로 하였다. 생리신호의 측정은 뇌파와 심전도를 측정하였다. 뇌파의 실험결과는 차가운 색 계통의 색채에서 $\alpha$파의 상대 전력비가 증가한 것을 볼 수 있었다. 또한 심전도의 HRV 분석 결과도 차가운 색 계통에서 HF/LF의 비가 증가한 것을 볼 수 있었으며, 이 결과로서 색채 조명이 인체의 감성변화에 영향을 미치는 것을 알 수 있었으며, 이 결과를 활용하여 색채 환경 설계에 도움을 줄 수 있으리라 사료된다.

• 대한한의진단학회지
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• 제10권2호
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• pp.79-87
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• 2006

Objective : Biologic responses to color stimulation was observed and analyzed in relation with Korean medicine diagnostics. Methods : Twelve volunteers participated and completed the questionnaire on Hanyeol or Joseup patterns of Korean medicine diagnostics. Standard deviation of RR intervals (SDNN), an overall indicator of heart rate variability, was measured while wearing partially transparent acetate film glasses of various colors: (1) transparency or black, (2) red, green, or blue, or (3) cyan, or yellow. Results : Different responses to the color environmental stimulation were observed. Yeol pattern score was inversely related with the SDNN value under red color stimulation. Conclusion : This line of observations may serve as a basis of clinical application of color therapy, in particular, in relation with pattern diagnosis of Korean medicine, and may be applied in combination with existing electrodermal meridian measurement systems for better evaluation of Gi (life energy) phenomenon.

• 대한의용생체공학회:의공학회지
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• 제11권1호
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• pp.65-70
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• 1990

The phenomenon of color sensory has been mainly studied on the relation with the stimulus source of light source color according to dispersed energy of light. However, it has not been definitely found that the phenomenon of color sensory be collcerned with evoked potentials stimulated by object color. This paper proposes the method that evoked potentials stimulated by object colors are analyzed and examined on the phenomemon of color sensory. The model of evoked potentials is assumed that it is consisted of an additive noise and a transient signal caused by stimulus. The method which is used to estimate the signal is time-varying filtering.

• 동의신경정신과학회지
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• 제20권1호
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• pp.165-176
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• 2009

Objectives : The purpose of this study was to assess the effects of mental stress stimulation and acupucnture applied at HT7 point on heart rate variability (HRV) in normal subjects. Methods : Thirty seven healthy volunteers participated in this study. The volunteers were randomly allocated into two groups. Both groups performed a mental arithmetic stress test and stroop color-word test for 10 minute. Then, acupuncture needles were inserted on HT7 for the study group and on non-acupucnture point for the control group. HRV was recorded three times at test time and before and after acupuncture stimulation. Results : After giving mental stress stimulation to both groups, LF and LF!HF ratio were increased and HF was decreased significantly. After giving acupuncture to study group, LF and LF/HF ratio were decreased and HF was increased, but it was not significant. After giving acupuncture to control group, LF and LF/HF ratio were increased and HF was decreased, but it was not significant. Conclusions : This results show that mental arithmetic stress test and stroop color-word test contribute to activation of the sympathetic nervous system Acupuncture at HT7 could be relatively useful to decrease sympathetic activity and balance autonomic nervous system for those who are under stress.

• 한국조경학회지
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• 제14권2호
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• pp.69-80
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• 1986

20대 남녀 50명씩 100명의 집단에 대해 투명의 아크릴 보드에 제작된 환상 및 격자상의 배열로 16을 배치하고 백색을 배경으로 평소에 가장 선호하는 색을 환상배열에서 선택하도록 하고 grey, blue, pink, yellow 및 yellow green을 배경으로 환상 및 격자상배열에서 가장 좋아보이는 색을 고르도록하였다. 또 16색상 각각을 white 및 black의 혼합배율에 배치하고 가장 좋아보이는 수준을 선택하도록 하였다. 20대 남녀 50명씩 두 집단의 색선호에는 큰 유이성이 없었으며 전체 집단의 경향은 다음과 같았다. 1) 색의 파장 증가에 대해서는 500nm 부근의 bluish green에 대해 가장 높은 선호를 보였고 그 보다 짧거나 긴 파장에 대해서는 선호정도는 감소되었다. (그림2). 자주순도의 증가와는 일차적인 비례관계을 보여 자극순도가 높은 색일수록 선호정도도 높았다. (그림3). 명도와의 관계는 파장과는 반대의 경향으로서 중간 명도에서 최저 선호를 보였으나 유의성이 낮아 색상간의 명도차이에 대해서는 반응이 미약한 것으로 보여졌다. (그림4). 2) 동일 색상내에서 색의 명도수준을 7단계로 하였을EO 16색상의 평균치에서 명도수준이 증가함에 따라 선호도 증가하여 중간정도의 명도에서 최고 반응을 보이고 그 이상의 명도 증가에서 선호는 감소하였다(그림 5). 3) 16색의 배치방법을 환상과 격자상으로 하고 배경색의 변화를 동일하게 하였을 때 선호색의 경향은 두 배치방법간에 차이가 없었으며, 배경색의 관계는 백색배경에서의 경우와 유사하게 파장은 부정적으로, 작그순도와 명도는 긍정적으로 영향을 미쳤다. 배경색의 파장, 자극순도, 명도의 변화와 선호되는 색과의 관계는 각 자극이 낮거나 높을 때는 그와 큰 차이가 나는 높은 자극 및 낮은 자극의 색이, 중간정도의 자극인 배경에서는 그와 유사한 자극의 색이 선호되는 것으로 나타났다(그림 6, 7, 8).

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.1171-1172
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• 2012

• 한국조경학회지
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• 제26권1호
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• pp.36-43
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• 1998

We compared the electroencephalogram, blood pressure, and sensory evaluation inspectioni several color of Petunia hybrida to analyze the physiopsychological effects of a plant. Considering occipital is related to visuosensory field, green color is thought as mild visual stimulator unlike to pink color. The results are coincident with the well-known facts that green color is less stimulating color. It is also accorded with the sensory evaluation results that green color showed te feeling of blue and stable. In case of green color is showed the feeling of blue and stable. In case of green color the generatioin of alpha waves increased according to the increase color area. Therefore it is thought that green color helps decrease of visual stimulation and increase in visual stability. However it is thought that pink has less physiopsychological effects on human beings depending on area sizes than green has.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2004년도 추계학술발표대회 논문집
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• pp.36-39
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• 2004

The purpose of this study is to extract the rage on exterior colors of Elementary schools in harmony with natural colors as the colors of sky and trees, of Which the colors is basically composing the natural environment. The theory of harmony in NCS relatively expressing the changed colors according to the color stimulation condition is the contrast of same color fit for the nature. NCS has a systematic open mind considering parts in the whole. The study suggests appropriate strategy for Eco-color scheme. The result shows that it's desirable to select YR Group in the elementray school of exterior color design, The Eco color planned by NCS is expected to clarify the interrelationship between children and environment. This practical use should be continuingly tried in the color design of interior for elementary schools.

• Journal of the Optical Society of Korea
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• 제16권2호
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• pp.145-150
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• 2012

We present a display-based visual stimulator for psychophysical and electrophysiological visual sensitivity measurements. The stimulator offers various psychophysical visual stimuli and transfers the signals from external devices along with the stimulation signals to an electrophysiological recorder. As an experimental demonstration, we perform a visual sensitivity experiment in the mesopic vision range by using the display-based stimulator. The intensity of the steady-state visual evoked potential is observed to correlate with the luminance of the flickering visual stimulation. For the psychophysically determined detection thresholds, we determine the mesopic luminance, showing agreement with the perceived brightness within the uncertainty of the luminance measurement.