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

摘要

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 so urce; 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.%本研究では、姿勢が光環境に対する知覚特性に及ぼす影響を検討するために実験を行った。視野内の光源位置による視知覚変化に関する既往研究での結果を応用し、光源位置・輝度レベル・注視条件による明るさ知覚特性を座位で検討した上に、臥位で比較実験を行い、明るさ知覚特性の変化を検討した。