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

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Science  09 May 1980:
Vol. 208, Issue 4444, pp. 619-621
DOI: 10.1126/science.7367887


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.