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Science 14 December 1962:
Vol. 138. no. 3546, pp. 1274 - 1275
DOI: 10.1126/science.138.3546.1274
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Articles

Correspondence between Stevens' Terminal Brightness Function and the Discriminability Law

Elmer E. Green 1

1 Department of Psychology, University of Chicago, Chicago 37, Illinois

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.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Refraction and Visual Physiology.
H. L. BAIR and T. G. MARTENS (1964)
Arch Ophthalmol 71, 889-915
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Science. ISSN 0036-8075 (print), 1095-9203 (online)