Weber law


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We·ber-Fech·ner law

the intensity of a sensation varies by a series of equal increments (arithmetically) as the strength of the stimulus is increased geometrically; if a series of stimuli are applied and so adjusted in strength that each stimulus causes a perceptible change in intensity of the sensation, then the strength of each stimulus differs from the preceding one by a constant fraction. Thus, if a perceptible change in a visual sensation is produced by the addition of 1 candle to an illumination with an original strength of 100 candles, then 10 candles will be required to produce a perceptible change in sensation in an illumination with an original strength of 1000 candles.

We·ber-Fech·ner law

(vā'ber-fek'nĕr law)
The intensity of a sensation varies by a series of equal increments (arithmetically) as the strength of the stimulus is increased geometrically; if a series of stimuli is applied and so adjusted in strength that each stimulus causes a just-perceptible change in intensity of the sensation, then the strength of each stimulus differs from the preceding one by a constant fraction.
Synonym(s): Fechner-Weber law, Weber law.

Weber law

The increase in stimulus necessary to produce the smallest perceptible increase in sensation bears a constant ratio to the strength of the stimulus already acting.

Weber,

Ernst Heinrich, German physiologist and anatomist, 1795-1878.
Fechner-Weber law - Synonym(s): Weber-Fechner law
Weber experiment - if the peripheral end of the divided vagus nerve is stimulated, the heart is arrested in diastole.
Weber law - Synonym(s): Weber-Fechner law
Weber paradox - if a muscle is loaded beyond its power to contract, it may elongate.
Weber-Fechner law - the intensity of a sensation varies by a series of equal increments as the strength of the stimulus is increased geometrically. Synonym(s): Fechner-Weber law; Weber law
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