Why is Weber s law important

Although weber's law is the most firmly established regularity in sensation, no principled way has been identified to choose between its many proposed explanations.For instance, it can explain why we are less likely to detect the removal of three nuts from a bowl if the bowl is full than if it is nearly empty.Thus, the more intense the stimulus, the greater the change that must be made in it to be noticed.The law states that the change in a stimulus that will be just noticeable is a constant ratio of the original stimulus.According to weber's law, this difference threshold is a constant proportion of the original threshold size.Where s is the reference stimuli.

It has been shown not to hold for extremes of stimulation.