Fechner's law

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Noun1.Fechner's law - (psychophysics) the concept that the magnitude of a subjective sensation increases proportional to the logarithm of the stimulus intensity; based on early work by E. H. Weber
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
psychophysics - the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects
References in periodicals archive ?
Unification of psychophysical phenomena: The complete form of Fechner's law.
Fechner's law is in accordance with this principle, asserting that each increase in stimulus intensity requires a larger increment for the perception of a JND (Cook, 1967).
Dally, parents and clinicians (and teachers, therapists and grandparents) unknowingly apply Weber's Ratio, Fechner's Law and Steven's Magnitude Estimation and decide whether what they see is worth one, two or three eyebrow raises.