The effect on foveal vision of bright surroundings - IV
The effect on foveal vision of bright surroundings - IV
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明亮环境对中心凹视力的影响-IV
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通讯作者：
P. Cobb
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作者：
P. Cobb
研究了不同场域和周围环境亮度条件下的阈值差异。观察是在 14 种不同的条件下进行的，每组 100 组，包含 25 种不同的刺激，每种刺激出现 4 次。涉及三名党卫军。描述了计算方法及其所基于的假设。结果显示，平均阈值是刻度上两点之间刺激间隔的一半，其中一个对应于视野左半部分出现较大亮度，另一个对应于视野右侧。结果的扩散显示出比阈值更高的一致性。左侧阈值大于右侧阈值。阈值的最小值存在于场与周围环境的相等点处或附近。由于各种亮度条件而导致的眼睛敏感度的变化取决于场亮度与周围环境之间的比率。 （PsycINFO 数据库记录 (c) 2012 APA，保留所有权利）
Investigated the difference threshold under various conditions of brightness of field and surroundings. The observations were taken under 14 different conditions, in groups of 100 consisting of 25 different stimuli presented 4 times each. Three Ss were involved. The method of computation and the assumptions on which it was based are described. Results show that the mean threshold was one half the stimulus interval between the two points on the scale, one corresponding to the appearance of greater brightness on the left half of the field and one on the right. The diffusion of results show much greater consistency than the threshold. The left threshold was larger than the right. A minimum in the threshold existed at or near the point of equality of field and surroundings. The changes in the sensitivity of the eye due to various brightness conditions were dependent on the ratio between the field brightness and the surroundings. (PsycINFO Database Record (c) 2012 APA, all rights reserved)