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Stevens’ Law

Stevens’ law: A psychophysical law that expresses a quantitative relationship between the intensity of a stimulus and the intensity of a sensation. in an exponential form. It is a modification of the basic Weber-Fechner psychophysical law (see above). which is often called a power law – especially in English sources. Although the idea of the power law was proposed by researchers in the 19th century. Stevens is credited with revitalizing the law and publishing a set of psychophysical data to support it in 1957.

Emotional reactions

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Function

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Reflex reaction

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Noise

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