Analysis of errors in color agnosia: A single-case study

Abstract The performance of an adult with color agnosia (JT) was investigated. Although perceptual color tests clearly demonstrated no difficulty in color discrimination, multidimensional scaling analysis (MDS) revealed that naming errors were constrained to confusions of adjacent points in the three-dimensional visual semantic color space. This pattern of confuslons replicated across other tasks drawing on knowledge of color concepts. The findings are interpreted as a partial disruption in mapping perceptual representations of color to prototype nodes in visual semantic color space. We propose that this methodology, already proven useful for investigation of category-specific visual object agnosia, will allow more detailed cross-case cornparlsons of color recognition disorders.

[1]  The syndrome of visual alexia with colour agnosia. , 1948, The Journal of mental science.

[2]  E. Warrington,et al.  Observations on colour agnosia , 1964, Journal of neurology, neurosurgery, and psychiatry.

[3]  C. Helm.  MULTIDIMENSIONAL RATIO SCALING ANALYSIS OF PERCEIVED COLOR RELATIONS. , 1964, Journal of the Optical Society of America.

[4]  N. Geschwind,et al.  Color-naming defects in association with alexia. , 1966, Transactions of the American Neurological Association.

[5]  J. Kruskal.  Multidimensional scaling by optimizing goodness of fit to a nonmetric hypothesis , 1964 .

[6]  R M Boynton,et al.  Uniqueness of perceived hues investigated with a continuous judgmental technique. , 1966, Journal of experimental psychology.

[7]  H. Kucera,et al.  Computational analysis of present-day American English , 1967 .

[8]  N. Humphrey,et al.  Varieties of colour anomia. , 1969, Brain : a journal of neurology.

[9]  R. Shepard,et al.  Second-order isomorphism of internal representations: Shapes of states ☆ , 1970 .

[10]  E. R. Heider.  "Focal" color areas and the development of color names. , 1971 .

[11]  M. Sidman,et al.  Right hemianopia with memory and color deficits in circumscribed left posterior cerebral artery territory infarction , 1971, Neurology.

[12]  Eleanor Rosch Heider,et al.  The structure of the color space in naming and memory for two languages , 1972 .

[13]  E. R. Heider.  Universals in color naming and memory. , 1972, Journal of experimental psychology.

[14]  J. Douglas Carroll,et al.  Chapter 13 – APPLICATIONS OF INDIVIDUAL DIFFERENCES SCALING TO STUDIES OF HUMAN PERCEPTION AND JUDGMENT , 1974 .

[15]  R. Bailey,et al.  The computer and literary studies , 1974 .

[16]  J. C. Meadows.  Disturbed perception of colours associated with localized cerebral lesions. , 1974, Brain : a journal of neurology.

[17]  G. Miller,et al.  Language and Perception , 1976 .

[18]  M. P. Friedman,et al.  HANDBOOK OF PERCEPTION , 1977 .

[19]  A. Damasio,et al.  Determinants of performance in color anomia , 1979, Brain and Language.

[20]  Children's perception of Munsell colors. , 1980, The Journal of psychology.

[21]  Edward E. Smith,et al.  Categories and concepts , 1984 .

[22]  J. Davidoff,et al.  Colour anomia resulting from weakened short-term colour memory. A case study. , 1984, Brain : a journal of neurology.

[23]  K. Mullen.  The contrast sensitivity of human colour vision to red‐green and blue‐yellow chromatic gratings. , 1985, The Journal of physiology.

[24]  M. Beauvois,et al.  Optic aphasia for colours and colour agnosia: A distinction between visual and visuo-verbal impairments in the processing of colours , 1985 .

[25]  Varieties of colour naming defects associated with posterior brain damage: a neurolinguistic reappraisal. , 1987 .

[26]  Varieties of colour naming defects associated with posterior brain damage: a neurolinguistic reappraisal. , 1987, Functional neurology.

[27]  香川高弘.  Locating Basic Colors in the OSA Space , 1987 .

[28]  Elizabeth K. Warrington,et al.  Visual Apperceptive Agnosia: A Clinico-Anatomical Study of Three Cases , 1988, Cortex.

[29]  Michael S. Gazzaniga,et al.  Acquired central dyschromatopsia: Analysis of a case with preservation of color discrimination , 1989 .

[30]  J. Cronly-Dillon,et al.  Visual Agnosias and Other Disturbances of Visual Perception and Cognition , 1991 .

[31]  J. Davidoff,et al.  Cognition Through Color , 1992 .

[32]  P. Arabie,et al.  Three-Way Scaling and Clustering. , 1991 .

[33]  L. Cosmides,et al.  The Adapted mind : evolutionary psychology and the generation of culture , 1992 .

[34]  Roger N. Shepard,et al.  The perceptual organization of colors: An adaptation to regularities of the terrestrial world? , 1992 .

[35]  J. Kruschke,et al.  ALCOVE: an exemplar-based connectionist model of category learning. , 1992, Psychological review.

[36]  R. Shepard,et al.  Representation of Colors in the Blind, Color-Blind, and Normally Sighted , 1992 .

[37]  Georg Goldenberg,et al.  Loss of visual imagery and loss of visual knowledge—A case study , 1992, Neuropsychologia.

[38]  Robert F. Hess,et al.  Is the visual field temporally homogeneous? , 1992, Vision Research.

[39]  K. T. Mullen,et al.  Absence of smooth motion perception in color vision , 1992, Vision Research.

[40]  G. Plant,et al.  Insights into the different exploits of colour in the visual cortex , 1994, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[41]  S. Edelman,et al.  Explorations of Shape Space , 1995 .

[42]  Robert F. Hess,et al.  Color and luminance vision in human amblyopia: Shifts in isoluminance, contrast sensitivity losses, and positional deficits , 1996, Vision Research.

[43]  Martin Arguin,et al.  Shape Integration for Visual Object Recognition and Its Implication in Category-Specific Visual Agnosia , 1996 .

[44]  Martin Arguin,et al.  The Interaction of Object Form and Object M eaning in the Identification Performance of a Patient with Category-specific Visual Agnosia , 1997 .

[45]  Martin Arguin,et al.  Semantic and Visual Determinants of Face Recognition in a Prosopagnosic Patient , 1998, Journal of Cognitive Neuroscience.

[46]  S. Edelman,et al.  Representation of object similarity in human vision: psychophysics and a computational model , 1998, Vision Research.

[47]  Knut Nordby,et al.  Is the rod visual field temporally homogeneous? , 1998, Vision Research.

[48]  S Edelman,et al.  Representation is representation of similarities , 1996, Behavioral and Brain Sciences.

[49]  D. Bub,et al.  Semantic Proximity and Shape Feature Integration Effects in Visual Agnosia for Biological Kinds , 1999, Brain and Cognition.