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Results for “COLOR PERCEPTION TESTS”

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At least 109 records · Page 6Linked to original sources
PubMed2001

Color vision deficiencies in Gilles de la Tourette syndrome.

Color perception was tested using the Farnsworth-Munsell 100-Hue Test in a sample of persons with Gilles de la Tourette syndrome (GTS), and compared to norms from three age cohorts in the early second, fourth and sixth decades. Red-green color errors on the Farnsworth-Munsell did not appear to change appreciably as a function of age or GTS. Blue-yellow error scores did, however, increase with age and were exaggerated in the GTS group. It is concluded that sensory and perceptual disturbances are present in GTS as in other basal cell ganglia disorders. The results are discussed in terms of converging retinal dopaminergic mechanisms also associated with Parkinson's and Huntington's diseases and even with normal aging. Suggestions are offered that daily activities and behavior may be affected by spatial and chromatic deficiencies.

Adult↗
PubMed1985

A practical guide for colour-vision examination: report of the Standardization Committee of the International Research Group on Colour-Vision Deficiencies.

There are different types and degrees of colour deficiency and some types of defect occur more frequently than others. Several different techniques are used for examining colour vision and many different tests are available commercially. Clinical tests have three aims: to screen for colour deficiency, to diagnose or classify the type of defect and to grade the severity of the defect. Individual tests do not fulfil all three aims and a test battery is recommended for any detailed colour-vision examination or for giving occupational advice. This paper provides information about congenital and acquired colour-vision defects and lists the principal colour-vision tests. Standardized test methods and viewing conditions are described. The efficiency of each test, for screening, diagnosis and grading is indicated and appropriate test batteries are recommended for different testing requirements.

Color Perception Tests↗
PubMed1999

Research note: a multidimensional scaling comparison of color metrics for response times and rated dissimilarities.

Individual-differences multidimensional scaling was applied to a set of proximity data for equiluminant lights (Paramei & Cavonius, 1999) to explore any differences between two data collection procedures (rated dissimilarities, and same/different response times [RTs]), as well as between color-normal and abnormal observers. Two conclusions emerged: (1) The pattern of similarities from observers with anomalous color vision can be understood in terms of a compressed color plane (the weighted Euclidean model of individual differences); and (2) there is evidence that the color "plane" is either curved or governed by a non-Euclidean distance function. When color-normal observers are examined in the weighted-Euclidean framework, minor differences emerge between RT and rating data. But the main distinguishing feature of RT data is a pattern of decreasing accuracy for larger color distances. This must be taken into account, since it can itself induce curvature.

Color Perception↗