Correspondence between Stevens' Terminal Brightness Function and the Discriminability Law
- 14 December 1962
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 138 (3546) , 1274-1275
- https://doi.org/10.1126/science.138.3546.1274
Abstract
Stevens' terminal brightness function, an adaptation curve derived from power law data, closely agrees with Troland's just-noticeable-difference (jnd) summation for brightness. The power law itself describes sensation magnitude before adaptation to a test stimulus, whereas the Fechnerian discriminability law describes sensation magnitude after adaptation. This suggests their synthesis in a more general psychophysical equation.Keywords
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