Weber Fechner Law

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Weber Fechner Law

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An approximate psychophysical law relating the degree of response or sensation of a sense organ and the intensity of the stimulus. The law asserts that equal increments of sensation are associated with equal increments of the logarithm of the stimulus, or that the just noticeable difference in any sensation results from a change in the stimulus which bears a constant ratio to the value of the stimulus. Also called Weber law . </dd>
The Weber-Fechner law is applied to the detection of contrast in the problem of visual range, as well as to many other psychophysical problems. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use