Just Noticeable Difference
The term just noticeable difference (JND) refers to the amount of change in stimulus intensity necessary to detect a reliable change in sensation. For example, when a stimulus above the absolute threshold is applied to a sense organ, the intensity of the stimulus must be increased by a critical amount (i.e., the JND) before a person is able to report change in sensation.
References and Readings
- Gescheider, G. A. (1997). Psychophysics: The fundamentals (3rd ed.). London: Erlbaum, Chapter 1.Google Scholar