End‐box scoring artefact evaluation of the Farnsworth‐Munsell 100‐Hue colour vision test

Viliūnas,; Lukauskienė, Rita; Švėgžda, Algimantas; Žukauskas, ArtÅ«ras

doi:10.1111/j.1475-1313.2006.00411.x

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…For example, if the caps were ordered 3‐4‐5‐6, the TES would be zero, but if the numbers were ordered 3‐5‐4‐6, the TES would be 4. Several researchers have shown that using the traditional scoring method produces some error since the end caps are fixed, however when TES scores are less than 240, corrections have little to no benefit 21. In addition to TES, a radial plot can be created for each test.…”

Section: Methodsmentioning

confidence: 99%

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Color discrimination capability under highly structured spectra

Royer

Houser

Wilkerson

2011

Color Research & Application

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An experiment was performed to test the capability of measures of gamut area to predict the color discrimination capability of lamps with highly structured spectra. Sixteen subjects completed a Farnsworth Munsell 100 Hue Test under four different lighting conditions of similar chromaticity: light emitting diodes (LEDs) that used red, green, and blue primaries; two types of linear fluorescent; and tungsten halogen. Total Error Score (TES) was significantly worse under the LEDs than the other three conditions, which produced statistically equivalent scores. No measure considered in this work, including Color Rendering Index, Color-Discrimination Index, or Farnsworth Munsell Gamut Area, was able to order correctly, let alone correlate with, the color discrimination capability of the four lamps, as characterized by TES. This calls into question the concept of using a measure of gamut area to characterize color discrimination as part of a multi-index tool for quantifying color rendition, especially since lamps with highly structured spectral output are becoming more prevalent for general illumination.

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Section: Methodsmentioning

confidence: 99%

“…Several researchers have shown that using the traditional scoring method produces some error since the end caps are fixed, however when TES scores are less than 240, corrections have little to no benefit. 21 In addition to TES, a radial plot can be created for each test. An example plot is shown in Fig.…”

Section: Dependent Variablementioning

confidence: 99%

Color discrimination capability under highly structured spectra

Royer

Houser

Wilkerson

2011

Color Research & Application

View full text Add to dashboard Cite

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“…16,17,19 It has also been used to test the color rendering properties of different light sources. [20][21][22][23][24] Each of the four series of discs is arranged in a wooden box to which two anchor discs are permanently mounted at either extreme.…”

Section: Apparatusmentioning

confidence: 99%

Color rendering: A tale of two metrics

Rea

Freyssinier-Nova

2008

Color Research & Application

205

173

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It was the best measure of color rendering, it was the worst measure of color rendering. Color rendering index (CRI) is the most common metric used by the lighting industry to represent the color rendering properties of electric light sources. CRI was intended to characterize how ''true'' or ''natural'' objects appeared when illuminated by a light source, but was never intended to, for example, represent how well object colors could be differentiated under a light source, another important aspect of color rendering. Data presented here demonstrate that CRI in conjunction with another measure of color rendering, gamut area index (GAI), is useful at predicting subjective judgments of how ''natural'' objects appear as well as how ''vivid'' objects appear, and how well one can discriminate between subtle differences in hue. Neither measure by itself, however, is sufficient for meeting all of the expectations of a light source for providing good color rendering under all viewing conditions. It remains for future research to determine if just two metrics are sufficient to assure good color rendering from a light source and whether these two metrics (CRI and GAI) are the best for such purpose. In the meantime, CRI and GAI should be used jointly in recommendations as practical, useful, and mutually reinforcing measures of color rendering. The data presented here also demonstrate that total irradiance is important for good color rendering.

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Antisaccade errors reveal cognitive control deficits in Parkinson’s disease with freezing of gait

et al. 2015

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Freezing of gait is a poorly understood symptom of Parkinson's disease (PD) that is commonly accompanied by executive dysfunction. This study employed an antisaccade task to measure deficits in inhibitory control in patients with freezing, and to determine if these are associated with a specific pattern of grey matter loss using voxel-based morphometry. PD patients with (n = 15) and without (n = 11) freezing along with 10 age-matched controls were included. A simple prosaccade task was administered, followed by a second antisaccade task that required subjects to either look towards or away from a peripheral target. Behavioral results from the antisaccade task were entered as covariates in the voxel-based morphometry analysis. Patient and control groups performed equally well on the first task. However, patients with freezing were significantly worse on the second, which was driven by a specific impairment in suppressing their responses toward the target on the antisaccade trials. Impaired antisaccade performance was associated with grey matter loss across bilateral visual and fronto-parietal regions. These results suggest that patients with freezing have a significant deficit of inhibitory control that is associated with volume reductions in regions crucial for orchestrating both complex motor behaviors and cognitive control. These findings highlight the inter-relationship between freezing of gait and cognition and confirm that dysfunction along common neural pathways is likely to mediate the widespread cognitive dysfunction that emerges with this symptom.

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End‐box scoring artefact evaluation of the Farnsworth‐Munsell 100‐Hue colour vision test

Cited by 6 publications

References 17 publications

Color discrimination capability under highly structured spectra

Color discrimination capability under highly structured spectra

Color rendering: A tale of two metrics

Antisaccade errors reveal cognitive control deficits in Parkinson’s disease with freezing of gait

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