Weber’s Law

Definition

A principle describing the relationship between stimulus and resulting sensation, stating that the Just Noticeable Difference is a constant proportion of the original intensity of the stimulus.

Related terms

Psychophysics:

The study of relationships between physical stimuli and mental phenomena.

Fechner's Law: It states that perceived intensity increases as a logarithm to actual physical intensity.

Stevens' Power Law: An empirical relationship in psychophysics between an increased level of physical stimulus and perceived intensity.