Abstract
FECHNER'S law, that sensation intensity is proportional to the logarithm of the intensity of the stimulus divided by its absolute threshold value (E = klog(R/R0)) presupposes that there is a single sensation intensity for every stimulus strength. This is true not only of Fechner' law but also of any alternative law of the general form E=f(R). Such invariable correspondence is only found, however, under artificially simplified conditions of perception. Under other conditions, it may break down at either of two points in the total process of perceiving: external stimulus → peripheral physiological process → central physiological process → phenomenon (that is, what is experienced).
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Thouless, R. Phenomenal Regression to the Real Object. Nature 131, 261–263 (1933). https://doi.org/10.1038/131261a0
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DOI: https://doi.org/10.1038/131261a0
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