explain steven's power law
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STEVEN'S POWER LAW-------------->>
Stevens' power law is a proposed relationship between the magnitude of a physical stimulus and the intensity or strength that people feel.
Most people think that it describes a wider range of sensations than Weber-Fechner law. But critics argue that the validity of the law is not sure.
The theory is named after psychophysicist Stanley Smith Stevens (1906–1973). Although the idea of a power law had been suggested by 19th century researchers, Stevens is credited with reviving the law and publishing a body of psychophysical data to support it in 1956.
The general form of the law is
{\displaystyle \psi (I)=kI^{a},\,\!} {\displaystyle \psi (I)=kI^{a},\,\!}
where {\displaystyle I} I is the magnitude of the physical stimulus, {\displaystyle \psi } \psi is the psychophysical function capturing sensation (the subjective size of the stimulus), {\displaystyle a} a is an exponent that depends on the type of stimulation and {\displaystyle k} k is a proportionality constant that depends on the type of stimulation and the units used.....
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