Answer:
Fechner's Principle or Fechner's Law
Explanation:
Both Weber's law and Fechner's law were formulated by Gustav Theodor Fechner in 1860. In his work the Elements of psychophysics and there he coined the term psychophysics and he said it is the interdisciplinary study of how humans perceive physical magnitudes. He went further to claim that "...psycho-physics is the exact doctrine of the relation of function or dependence between body and soul
Fechner's law states that, "the subjective sensation is proportional to the logarithm of the stimulus intensity".
According to this law, human perceptions of sight and sound work as follows: Perceived loudness/brightness is proportional to logarithm of the actual intensity measured with an accurate non-human instrument.
The law talks about human perception, specifically the relation between the actual change in a physical stimulus and the perceived change. This includes stimuli to all senses: vision, hearing, taste, touch, and smell.
This is the principle talked about in the question.
Moreover, The Steven's power law proposed by a psycho-physicist Stanley Smith Stevens (1906–1973).
Is a modification to the Fechner's Law,
It further describes the relationship between stimulus and resulting sensation and it states that the magnitude of subjective sensation(S) is proportional to the stimulus magnitude(l) raised to an exponent(b). That is; S=aI^b (a is a constant of proportionality
Formula>>> S= al^b
Where S = the subjective sensation
I = the stimulus magnitude
b= The exponential
While a = the proportionality constant.
