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Paradoxical shifts in human color sensitivity caused by constructive and destructive interference between signals from the same cone class

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dc.contributor.author Stockman, Andrew en_US
dc.contributor.author Montag, Ethan en_US
dc.contributor.author Plummer, Daniel en_US
dc.date.accessioned 2006-12-18T16:47:37Z en_US
dc.date.available 2006-12-18T16:47:37Z en_US
dc.date.issued 2006-05 en_US
dc.identifier.citation Visual Neuroscience 23N3-4 (2006) 471-478 en_US
dc.identifier.issn 0952-5238 en_US
dc.identifier.uri http://hdl.handle.net/1850/3019 en_US
dc.description.abstract Paradoxical shifts in human color (spectral) sensitivity occur on deep-red (658 nm) background fields. As the radiance of the deep-red background is increased from low to moderate levels, the spectral sensitivity for detecting 15-Hz flicker shifts toward shorter wavelengths, although by more than is predicted by selective chromatic adaptation (e.g., Eisner & MacLeod, 1981; Stromeyer et al., 1987; Stockman et al., 1993). Remarkably, though, at higher background radiances, the spectral sensitivity then shifts precipitously back towards longer wavelengths. Here, we show that both effects are due in large part to destructive and constructive interference between signals generated by the same cone type. Contrary to the conventional model of the human visual system, the M- and L-cone types contribute not just the customary fast signals to the achromatic or luminance pathway, but also slower signals of the same or opposite sign. The predominant signs of the slow M- and L-cone signals change with background radiance, but always remain spectrally opposed (M-L or L-M). Consequently, when the slow and fast signals from one cone type destructively interfere, as they do near 15 Hz, those from the other cone type constructively interfere, causing the paradoxical shifts in spectral sensitivity. The shift in spectral sensitivity towards longer wavelengths is accentuated at higher temporal frequencies by a suppression of fast M-cone signals by deep-red fields. en_US
dc.description.sponsorship n/a en_US
dc.format.extent 71173 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Cambridge University Press en_US
dc.relation.ispartofseries vol. 23 en_US
dc.relation.ispartofseries nos. 3/4 en_US
dc.subject Chromatic en_US
dc.subject Color vision en_US
dc.subject Flicker sensitivity en_US
dc.subject Luminance en_US
dc.subject Phase differences en_US
dc.subject Postreceptoral channels en_US
dc.subject Spectral sensitivity en_US
dc.title Paradoxical shifts in human color sensitivity caused by constructive and destructive interference between signals from the same cone class en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1017/S0952523806233133

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