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Science 9 May 1980:
Vol. 208. no. 4444, pp. 619 - 621
DOI: 10.1126/science.7367887
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Articles

Science, Vol 208, Issue 4444, 619-621
Copyright © 1980 by American Association for the Advancement of Science

articles

Suprathreshold processing of complex visual stimuli: evidence for linearity in contrast perception

AP Ginsburg, MW Cannon, and MA Nelson

Magnitude estimation experiments show that perceived contrast for both sine and square waves is a linear function of stimulus contrast. The suprathreshold sine:square ratio required for equal perceived contrast derived from these data was verified by contrast matching experiments. These findings imply a high degree of linearity in suprathreshold visual processing of contrast.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)