Search Results - "Shevell, S K"

Trichromatic color vision with only two spectrally distinct photopigments by Neitz, J, Neitz, M, He, J. C, Shevell, S. K

“…Protanomaly is a common, X-linked abnormality of color vision. Like people with normal color vision, protanomalous observers are trichromatic, but their…”
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Chromatic induction: border contrast or adaptation to surrounding light? by Shevell, Steven K, Wei, Jianping

“…Chromatic induction from a surrounding light is measured with an additional remote field outside the surround. Chromatic induction from the surround into a…”
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Answering Autobiographical Questions: The Impact of Memory and Inference on Surveys by Bradburn, Norman M., Rips, Lance J., Shevell, Steven K.

“…Survey questions often probe respondents for quantitative facts about events in their past: ``During the last 2 weeks, on days when you drank liquor, about how…”
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Relating color discrimination to photopigment genes in deutan observers by Shevell, S.K, He, J.C, Kainz, P, Neitz, J, Neitz, M

“…Deutan observers are a heterogeneous group, varying nearly continuously from deuteranomalous trichromats with fine chromatic discrimination in the red/green…”
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Chromatic induction with remote chromatic contrast varied in magnitude, spatial frequency, and chromaticity by Barnes, Claire S, Wei, Jianping, Shevell, Steven K

“…Chromatic induction from a surround is attenuated by chromatic contrast within a remote region outside of the surround (Shevell & Wei, 1998, Vision Research,…”
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Color appearance with sparse chromatic context by Jenness, J W, Shevell, S K

“…We compared changes in the appearance of a test region caused by introducing an inhomogeneous chromatic background to changes caused by a space-averaged…”
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Brightness contrast from inhomogeneous surrounds by Schirillo, James A., Shevell, Steven K.

“…The luminance of a test within an inhomogeneous (“checkerboard”) surround was adjusted to match the brightness of a comparison patch within a uniform surround…”
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Color perception with test and adapting lights perceived in different depth planes by Shevell, Steven K., Miller, Paul R.

“…Adapting to a chromatic light can alter the color appearance of other lights in view. The chromatic adapting effect is measured here with the test and adapting…”
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A year's memories : The calendar effect in autobiographical recall by KURBAT, M. A, SHEVELL, S. K, RIPS, L. J

“…When asked to recall autobiographical events from the past year, students tend to recall more incidents from the beginning and the end of school terms than…”
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Large shifts in color appearance from patterned chromatic backgrounds by Shevell, Steven K, Monnier, Patrick

“…The perceived color of a light varies with the background on which it is seen. In the present study, patterned backgrounds composed of two different…”
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Color perception within a chromatic context: changes in red/green equilibria caused by noncontiguous light by Wesner, M F, Shevell, S K

“…We measured changes in the color appearance of one light caused by another light presented in a well-separated region. Observers viewed a 1 degrees test field…”
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The Visual Photopigments of Simple Deuteranomalous Trichromats Inferred from Color Matching by SHEVELL, STEVEN K, CHANG HE, JI

“…Deuteranomalous trichromacy is the most common form of inherited color-vision deficiency. A modern description of its cause is a single abnormality: the normal…”
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Redness from short-wavelength-sensitive cones does not induce greenness by Shevell, S K

“…According to opponent-colors theory, a reddish surround induces greenness in a central test field. Color-appearance measurements verify this with a…”
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Serine/alanine amino acid polymorphism of the L-cone photopigment assessed by dual Rayleigh-type color matches by Sanocki, E, Shevell, S K, Winderickx, J

“…The dual Rayleigh-type color match is the ratio of 621 nm light to 550 nm light that in admixture matches 586 nm light, divided by the ratio of 667 nm light to…”
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Individual differences in cone photopigments of normal trichromats measured by dual Rayleigh-type color matches by He, J C, Shevell, S K

“…Individual differences in color matches of normal trichromats are well documented. Recently, variants of the classical Rayleigh match have been measured to…”
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Foveal cone detection statistics in color-normals and dichromats by Wesner, M F, Pokorny, J, Shevell, S K, Smith, V C

“…We measured for six male observers, the psychometric functions for the detection of two simultaneously presented points of light. The test stimuli were two 1…”
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Color perception within a chromatic context: the effect of short-wavelength light on color appearance by Wesner, M F, Shevell, S K

“…Light at the boundary of a uniform test field (contrast) has a qualitatively different effect on color perception than light in more remote noncontiguous…”
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Color memory and color constancy by Jin, E W, Shevell, S K

“…Color constancy is the perceived stability of the color of objects despite changes in the light illuminating them. An object's color is considered constant if…”
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Relating cone signals to color appearance: failure of monotonicity in yellow/blue by Knoblauch, K, Shevell, S K

“…Observers performed red-green and yellow-blue hue cancellation tasks for a 0.8-deg circular test field on a dark surround, by manipulating the excitation level…”
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Color perception under chromatic adaptation: red/green equilibria with adapted short-wavelength-sensitive cones by Shevell, S K, Humanski, R A

“…Chromatic adaptation can dramatically alter the color appearance of a light. The specific effect of adapting short-wavelength-sensitive (SWS) cones is examined…”
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