Just Noticeable Difference
Published Online: 30 JAN 2010
Copyright © 2010 John Wiley & Sons, Inc. All rights reserved.
Corsini Encyclopedia of Psychology
How to Cite
Stern, M. K. and Johnson, J. H. 2010. Just Noticeable Difference. Corsini Encyclopedia of Psychology. 1–2.
- Published Online: 30 JAN 2010
The concept of just noticeable difference (jnd), also known as the difference threshold or difference limen (Latin for threshold), derives from early work in the area of classical psychophysics conducted in the mid-nineteenth century. This work was highlighted by Weber (1795–1878), a German physiologist, whose experimental investigations focused on tactile stimulation and the determination of sensory thresholds. Weber's seminal work in this area was extended and elaborated upon by German philosopher and mathematician Fechner (1801–1878), who coined the term “psychophysics” to refer to this area of experimental psychology and, in 1860, published the first textbook on psychophysics, which laid out the basic goals of this emerging discipline and the scientific methods that were to be employed to advance knowledge in this area (Watson, 1973).
- Weber's law;