Surface color naming in dichromats

Montag, Ethan D.

doi:10.1016/0042-6989(94)90323-9

Cited by 30 publications

(38 citation statements)

References 31 publications

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“…As n]entiooed previously, our group's work is higbly relaled lo thai of Moniag (1994;Moniag & Boynion, 1989 (1994;Moníag & Boytoí], 1989), they eballenge an emineot idea <bat has pervaded many related fields of visual pereep<ioo: thaI Ibe visual response produced by mediumor large-sized s<irnoli is similar lo chaí produeed by small stimuli projeeled onto Ihe macular retina. This idea underlies contemporary photomelry, for example, allbougb it is currcnLly receiving mucb critieism in Ibis area (Folios & Levermore, 1997;Lynes, 1996).…”

Section: Methodsmentioning

confidence: 81%

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Towards a Model To Predict Macular Dichromats' Naming Errors: Effects of CIE Saturation and Dichromatism Type

et al. 2001

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Thirty macular dichromat cbildrcn (12 protanopes + 18 deuteranopes> and 29 controls. bctwccn 5 and 9 years oíd. participated in a monolexemie denomination task. Their clinica] status was determined alter a repeated application of a cbromatic tcst set (Ishihara, CtJCVT.and TIDA). TOe stimuli to be named werc 12 tiles from tOe Color-Aid set belonging to thc green. blue. and purpie basic categories. Rcsults showed that: (a) Dicliromais made more narnlng crrors when Iow saturarion síimuli were used; (b) prolanopes made more enors that deuteranopes; and (e) psoudoisochromatic unes predicted accurately tOe type of rnost frequent nam¡ng crrors bat they undercstimated macular dicbromats' functional capaeity lo name colors. Results are consistcnt witli a model of macular dicliromats' vision that bypothesizes a residual tbird type of conc in tOe peripliery of thc retina.1 inpl cal ions of thi s fact for cveryday use of colurs by macular dichrornats' aud for tOe validity of standard clinical diagnoses aro discussed, Kes ,vordg: color blindoúss. color coregorizotio,z, clinical cliag~zo.sis. dichro,nausn, Treinta niños dicromáticos maculares (12 protanopes + 18 deuteranopes) y 29 controles, con edades comprendidas entre los 5 y 9 años, participaron en una tarea monolexémica de denominación de colores. Su categoria clinica se estableció partiendo de los resultados obtenidos tras la doble aplicación de una batería de tests cromáticos

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Section: Methodsmentioning

confidence: 81%

“…1980), se!ec<ivc adapla<ion (Scbeiboer & Boynton. 1968), fluciua<ion cotorimetry (Frorne, Pianlanida, & Kelly, 1982) atid color narning (Montag, 1994;Nagy & Boynton, 1979) agree ibal macular dichromats have a third Lype of cone, wbich is tike an anoma¡ous versiotl of ¡he cone <bat is absen< in ¡heir macula.…”

Section: Basic Coiorsmentioning

confidence: 99%

Towards a Model To Predict Macular Dichromats' Naming Errors: Effects of CIE Saturation and Dichromatism Type

et al. 2001

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“…In color naming studies, it has been shown that dichromats can name colors in fair agreement with color-normal observers~Scheib-ner & Boynton, 1968;Nagy & Boynton, 1979;Montag & Boynton, 1987;Montag, 1994 Under very dim light levels where rods alone mediate vision, color-normal observers consistently report color names based on relative sample scotopic lightness. We speculated that developmental and long-term experience with viewing familiar objects in the natural environment under dim illumination allowed color normal observers to infer that bright appearing objects are richer in shorter wavelength light compared to dim appearing objects.…”

Section: Discussionmentioning

confidence: 99%

The color of night: Surface color categorization by color defective observers under dim illuminations

et al. 2008

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People with normal trichromatic color vision experience variegated hue percepts under dim illuminations where only rod photoreceptors mediate vision. Here, hue perceptions were determined for persons with congenital color vision deficiencies over a wide range of light levels, including very low light levels where rods alone mediate vision. Deuteranomalous trichromats, deuteranopes and protanopes served as observers. The appearances of 24 paper color samples from the OSA Uniform Color Scales were gauged under successively dimmer illuminations from 10 to 0.0003 Lux~1.0 to Ϫ3.5 log Lux!. Triads of samples were chosen representing each of eight basic color categories; "red," "pink," "orange," "yellow," "green," "blue," "purple," and "gray." Samples within each triad varied in lightness. Observers sorted samples into groups that they could categorize with specific color names. Above Ϫ0.5 log Lux, the dichromatic and anomalous trichromatic observers sorted the samples into the original representative color groups, with some exceptions. At light levels where rods alone mediate vision, the color names assigned by the deuteranomalous trichromats were similar to the color names used by color normals; higher scotopic reflectance samples were classified as blue-green-grey and lower reflectance samples as red-orange. Color names reported by the dichromats at the dimmest light levels had extensive overlap in their sample scotopic lightness distributions. Dichromats did not assign scotopic color names based on the sample scotopic lightness, as did deuteranomalous trichromats and colour-normals. We reasoned that the reduction in color gamut that a dichromat experiences at photopic light levels leads to a limited association of rod color perception with objects differing in scotopic reflectance.

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“…There is evidence that dichromats may, under certain conditions, perform as trichromats, 28,29 and it has been suggested that dichromats may have a third anomalous pigment. 30 It is also known that there are genetic variations among clinical dichromats that could encode two kinds of M or L cones in as many as 13% of clinically diagnosed dichromats. 31 A simpler explanation may lie with the fact that those with severe CVD are not totally color blind.…”

Section: Why Do Some With Severe Color Vision Deficiency Name Colors mentioning

confidence: 99%

Categorical Color Naming of Surface Color Codes by People With Abnormal Color Vision

Cole

Lian

Sharpe

et al. 2006

Optometry and Vision Science

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Surface color naming in dichromats

Cited by 30 publications

References 31 publications

Towards a Model To Predict Macular Dichromats' Naming Errors: Effects of CIE Saturation and Dichromatism Type

Towards a Model To Predict Macular Dichromats' Naming Errors: Effects of CIE Saturation and Dichromatism Type

The color of night: Surface color categorization by color defective observers under dim illuminations

Categorical Color Naming of Surface Color Codes by People With Abnormal Color Vision

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