Weber-Fechner law in AP Psychology

Definition

The Weber-Fechner law is a principle in psychology that states the relationship between the intensity of a stimulus and its perceived magnitude. It suggests that the perceived magnitude increases logarithmically as the intensity of the stimulus increases.

Related terms

Just Noticeable Difference (JND):

The smallest difference between two stimuli that can be detected by an individual. For example, if you have a cup of warm water and someone adds a small amount of hot water, at what point would you notice the change in temperature?

Absolute Threshold:

The minimum level of stimulus intensity required for it to be detected or experienced by an individual. An example would be how dim does a light need to be before you're unable to see it anymore?

Signal Detection Theory:

A theory that focuses on how individuals detect signals amidst background noise or distractions. This theory takes into account both sensitivity to stimuli (signal) and decision-making processes.