Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4036161 | Vision Research | 2006 | 12 Pages |
Abstract
The spectral sensitivity of the eye was investigated using reaction times to broadband chromatic stimuli over a range of background luminances. Relative sensitivity was determined from the nonlinear reaction time curve by converting reaction times to a linear measure that was independent of spectral sensitivity. Two models for mesopic spectral sensitivity were compared. The first was a linear combination of V (λ) and V′ (λ), and the second included input from the L-M colour-opponent mechanism and the S-cones. The second model produced a significantly better fit to the data. The chromatic mechanisms appear to contribute to reaction time when there is an appreciable chromatic signal but luminance contrast is low.
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Authors
H.C. Walkey, J.A. Harlow, J.L. Barbur,