ON THE THEORY OF WEBER FRACTIONS
ON THE THEORY OF WEBER FRACTIONS
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DOI：
10.3758/bf03203081
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发表时间：
1987-09-01
期刊：
影响因子：
--
通讯作者：
NORWICH, KH
中科院分区：
文献类型：
--
作者：
NORWICH, KH
韦伯分数被视为感知的信息理论观点的一部分。在这种感觉知觉理论中，主观幅度与从刺激到感知者的信息传递有关。根据条件，导出的心理物理定律可以近似为幂或对数定律。韦伯分数的数学表达式是作为心理物理定律的导数获得的。这里得出的许多有趣的关系之一是，史蒂文斯指数与log10刺激范围的乘积，对于许多感觉模态，等于每个刺激传输的最大信息（以位为单位，在分类判断测试中测量）乘以0.6。这个数字是一个派生常数，不是从数据中测量的。
The Weber fraction is treated as part of an information theoretical view of perception. In this theory of sensory perception, subjective magnitude is related to the information transmissible from stimulus to perceiver. The derived psychophysical law can be approximated as a power or logarithmic law, depending on conditions. The mathematical expression for the Weber fraction is obtained as a derivative of the psychophysical law. One of many interesting relationships derived here is that the product of the Stevens exponent with log10 stimulus range, for many sensory modalities, is equal to the maximum information transmitted per stimulus (in bits, measured in a test of categorical judgments) multiplied by 0.6. This number is a derived constant and is not measured from the data.