Just Noticeable Difference (JND)

The Just Noticeable Difference, also known as the Difference Threshold, refers to the smallest perceptible change in a stimulus that can be detected by an observer.

Threshold of Perception

The Threshold of Perception is the point at which a stimulus becomes detectable by an individual’s senses.

Psychophysics

Psychophysics is a subfield of psychology that studies the relationship between physical stimuli and the subjective sensations they produce in human perception.

Weber’s Law

Weber’s Law states that the JND is proportional to the magnitude of the original stimulus. In other words, the JND is a constant ratio of the initial stimulus value.