Laws of Sensory Magnitude
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THE logarithmic law relating sensation and stimulus intensity which was first put forward by Fechner1 has in recent years been seriously challenged: it is claimed that experiment can show directly that the true psychophysical law is a power function2. But if the relation between these alternative laws is examined it appears that, unless special assumptions are made, the choice between them is not empirical, but conventional.
[1] Gösta Ekman,et al. Two Generalized Ratio Scaling Methods , 1958 .
[2] S. S. Stevens. The Psychophysics of Sensory Function. , 1960 .