姿勢による明るさ知覚特性に関する実験的研究 : 座位と臥位での比較

概要

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The purpose of this study is to compare the perception of the brightness of light in sitting posture against reclining posture through an experiment. Three factors were controlled in the experiment : the position of light source; the luminance of the source; and the subject's gazing condition in reference to the source. The subjects were allowed to adjust the brightness of the compared light source with the brightness of the standard light source. Then, the ratio of brightness between the compared and the standard source was analyzed at each posture. The followings results were obtained : 1) The relative position in visual field which is most sensitive to brightness changes along with posture. 2) The difference among the ratio of three luminance levels is larger in sitting posture than reclining posture. 3) Peripheral visual field is perceived as being more brightly than the central visual regardless of position, luminance of light sources and subject's posture.
2007-10-30