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Fechner's Law: Where Does the Log Transform Come From?

机译:费希纳定律:原木变换从何而来?

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This paper looks at Fechner's law in the light of 150 years of subsequent study. In combination with the normal, equal variance, signal-detection model, Fechner's law provides a numerically accurate account of discriminations between two separate stimuli, essentially because the logarithmic transform delivers a model for Weber's law. But it cannot be taken to be a measure of internal sensation because an equally accurate account is provided by a x~2 model in which stimuli are scaled by their physical magnitude. The logarithmic transform of Fechner's law arises because, for the number of degrees of freedom, typically required in the x~2 model, the logarithm of a x~2 variable is, to a good approximation, normal. This argument is set within a general theory of sensory discrimination.
机译:本文根据150年的后续研究来研究费希纳定律。结合正常的,等方差的信号检测模型,费希纳定律在数字上准确地说明了两个单独的刺激之间的区别,这主要是因为对数变换提供了韦伯定律的模型。但是,不能将其视为内部感觉的一种度量,因为x〜2模型提供了同等准确的说明,其中刺激根据其物理大小进行缩放。费希纳定律的对数变换之所以出现,是因为对于x〜2模型中通常需要的自由度数,x〜2变量的对数是一个很好的近似值。该论点是在一般的感官歧视理论中提出的。

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