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近百年来,针对韦伯定律的各种修正方案,虽经多次提出,但始终未能成功地揭示差别阈对标准刺激强度的普适规律,或称“差别阈定理”。 本文以刺激-效应的统一模型为基础,推导出的差别阈定理,能在较小误差范围内拟合简单的提重实验以至韦伯分数变动百倍以上的明度实验。 对结果的分析还表明:在10~(-3)-10~3毫朗这个日常生活的照明范围里,人眼感受性的调制,主要靠瞳孔变化完成;间视觉的主要分析器是棒体本身;并给出了这个视觉区间的刺激强度上限。
Over the past hundred years, various correction programs for Weber’s law have been proposed many times, but they have failed to reveal the universal law of difference threshold to standard stimulus intensity, or “difference threshold theorem”. In this paper, based on the stimulus-effect unified model, the differential thresholding deduced can fit a simple lifting experiment to a lightness experiment with a hundred times more fluctuation of Weber’s score within a smaller error range. Analysis of the results also shows that in the range of illumination of 10-3 (-10-3) millimeters per day, the sensory modulation of the human eye is mainly accomplished by pupil changes; the main analyzer of the inter vision is the body itself ; And gives the upper limit of stimulation intensity for this visual range.