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Visual Learning and the Brain: Implications for Dyslexia

Visual Learning and the Brain: Implications for Dyslexia ABSTRACT— The central and peripheral visual fields are structurally segregated in the brain and are differentiated by their anatomical and functional characteristics. While the central field appears well suited for tasks such as visual search, the periphery is optimized for rapid processing over broad regions. People vary in their abilities to make use of information in the center versus the periphery, and we propose that this bias leads to a trade‐off between abilities for sequential search versus contemporaneous comparisons. The parameter of periphery‐to‐center ratio (PCR) describes the degree of peripheral bias, which evidence suggests is high in many people with dyslexia. That is, many dyslexics favor the peripheral visual field over the center, which results in not only search deficits but also (more surprisingly) talents for visual comparison. The PCR framework offers a coherent explanation for these seemingly contradictory observations of both deficit and talent in visual processing. The framework has potential implications for instructional support in visually intensive domains such as science and mathematics. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mind, Brain, and Education Wiley

Visual Learning and the Brain: Implications for Dyslexia

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Publisher
Wiley
Copyright
2007 International Mind, Brain, and Education Society and Blackwell Publishing, Inc.
ISSN
1751-2271
eISSN
1751-228X
DOI
10.1111/j.1751-228X.2007.00013.x
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT— The central and peripheral visual fields are structurally segregated in the brain and are differentiated by their anatomical and functional characteristics. While the central field appears well suited for tasks such as visual search, the periphery is optimized for rapid processing over broad regions. People vary in their abilities to make use of information in the center versus the periphery, and we propose that this bias leads to a trade‐off between abilities for sequential search versus contemporaneous comparisons. The parameter of periphery‐to‐center ratio (PCR) describes the degree of peripheral bias, which evidence suggests is high in many people with dyslexia. That is, many dyslexics favor the peripheral visual field over the center, which results in not only search deficits but also (more surprisingly) talents for visual comparison. The PCR framework offers a coherent explanation for these seemingly contradictory observations of both deficit and talent in visual processing. The framework has potential implications for instructional support in visually intensive domains such as science and mathematics.

Journal

Mind, Brain, and Education – Wiley

Published: Sep 1, 2007

References

  • Age and visual search: Expanding the useful field of view
    Ball, Ball; Beard, Beard; Roenker, Roenker; Miller, Miller; Griggs, Griggs
  • A green bank telescope search for water masers in nearby galactic nuclei
    Braatz, Braatz; Henkel, Henkel; Greenhill, Greenhill; Moran, Moran; Wilson, Wilson
  • The effects of local context in visual search: A connectionist model and behavioral study of contextual cueing
    Brady, Brady; Chun, Chun
  • The eccentricity effect: Target eccentricity affects performance on conjunction searches
    Carrasco, Carrasco; Evert, Evert; Chang, Chang; Katz, Katz
  • Attention speeds processing across eccentricity: Feature and conjunction searches
    Carrasco, Carrasco; Giordano, Giordano; McElree, McElree
  • Speed of visual processing increases with eccentricity
    Carrasco, Carrasco; McElree, McElree; Denisova, Denisova; Giordano, Giordano
  • Contextual cueing: Implicit learning and memory of visual context guides spatial attention
    Chun, Chun; Jiang, Jiang
  • The influence of artificial scotomas on eye movements during visual search
    Cornelissen, Cornelissen; Bruin, Bruin; Kooijman, Kooijman
  • Topography of ganglion cells in human retina
    Curcio, Curcio; Allen, Allen
  • Physiology, morphology and spatial densities of identified ganglion cell types in primate retina
    Dacey, Dacey
  • The representation of the visual field on the cerebral cortex in monkeys
    Daniel, Daniel; Whitteridge, Whitteridge
  • The visual deficit theory of developmental dyslexia
    Eden, Eden; VanMeter, VanMeter; Rumsey, Rumsey; Zeffiro, Zeffiro
  • An eye for the unusual: Creative thinking in dyslexics
    Everatt, Everatt; Steffert, Steffert; Smythe, Smythe
  • The spatial distribution of visual attention in developmental dyslexia
    Facoetti, Facoetti; Paganoni, Paganoni; Lorusso, Lorusso
  • Visual‐spatial attention in developmental dyslexia
    Facoetti, Facoetti; Paganoni, Paganoni; Turatto, Turatto; Marzola, Marzola; Mascetti, Mascetti
  • Cortical visual areas in monkeys: Location, topography, connections, columns, plasticity and cortical dynamics
    Gattass, Gattass; Nascimento‐Silva, Nascimento‐Silva; Soares, Soares; Lima, Lima; Jansen, Jansen; Diogo, Diogo
  • Peripheral vision in persons with dyslexia
    Geiger, Geiger; Lettvin, Lettvin
  • Developmental dyslexia: A different perceptual strategy and how to learn a new strategy for reading
    Geiger, Geiger; Lettvin, Lettvin
  • Task‐determined strategies of visual process
    Geiger, Geiger; Lettvin, Lettvin; Zegarra‐Moran, Zegarra‐Moran
  • Letter identification and lateral masking in dyslexic and average readers
    Goolkasian, Goolkasian; King, King
  • Perceptual evidence for an anomalous distribution of rods and cones in the retinas of dyslexics: A new hypothesis
    Grosser, Grosser; Spafford, Spafford
  • Light sensitivity in peripheral retinal fields of dyslexic and proficient readers
    Grosser, Grosser; Spafford, Spafford
  • Object identification without foveal vision: Evidence from an artificial scotoma paradigm
    Henderson, Henderson; McClure, McClure; Pierce, Pierce; Schrock, Schrock
  • Dyslexics are impaired on implicit higher‐order sequence learning, but not on implicit spatial context learning
    Howard, Howard; Howard, Howard; Japikse, Japikse; Eden, Eden
  • Visual search performance in dyslexia
    Iles, Iles; Walsh, Walsh; Richardson, Richardson
  • Vigabatrin, a gabaergic antiepileptic drug, causes concentric visual field defects
    Kalviainen, Kalviainen; Nousiainen, Nousiainen; Mantyjarvi, Mantyjarvi; Nikoskelainen, Nikoskelainen; Partanen, Partanen; Partanen, Partanen
  • Letter identification declines with increasing retinal eccentricity at the same rate for normal and dyslexic readers
    Klein, Klein; Berry, Berry; Briand, Briand; D’Entremont, D’Entremont; Farmer, Farmer
  • Discovery of water maser emission in eight galactic nuclei with 70‐M antennas of NASA’s Deep Space Network
    Kondratko, Kondratko; Greenhill, Greenhill; Moran, Moran; Lovell, Lovell; Kuiper, Kuiper; Jauncey, Jauncey
  • The effect of a central task on luminance thresholds for peripherally presented stimuli
    Leibowitz, Leibowitz; Appelle, Appelle
  • Functional analysis of the periphery effect in human building related areas
    Levy, Levy; Hasson, Hasson; Harel, Harel; Malach, Malach
  • Physiological and anatomical evidence for a magnocellular defect in developmental dyslexia
    Livingstone, Livingstone; Galaburda, Galaburda; Rosen, Rosen; Drislane, Drislane
  • Segregation of form, color, movement, and depth: Anatomy, physiology, and perception
    Livingstone, Livingstone; Hubel, Hubel
  • Wider recognition in peripheral vision common to different subtypes of dyslexia
    Lorusso, Lorusso; Facoetti, Facoetti; Pesenti, Pesenti; Cattaneo, Cattaneo; Molteni, Molteni; Geiger, Geiger
  • Subtypes of reading disability: Variability around a phonological core
    Morris, Morris; Stuebing, Stuebing; Fletcher, Fletcher; Shaywitz, Shaywitz; Lyon, Lyon; Shankweiler, Shankweiler
  • Word blindness’ in school children
    Orton, Orton
  • Individual differences in working memory during reading with and without parafoveal information: A moving‐window study
    Osaka, Osaka; Osaka, Osaka
  • Thumb’s rule tested: Visual angle of thumb’s width is about 2 deg
    O’Shea, O’Shea
  • Letter identification in normal and dyslexic readers: A verification
    Perry, Perry; Dember, Dember; Warm, Warm; Sacks, Sacks
  • Raised visual detection thresholds depend on the level of complexity of cognitive foveal loading
    Plainis, Plainis; Murray, Murray; Chauhan, Chauhan
  • Effects of parietal injury on covert orienting of attention
    Posner, Posner; Walker, Walker; Friedrich, Friedrich; Rafal, Rafal
  • Neurobiology of dyslexia: A reinterpretation of the data
    Ramus, Ramus
  • Eye movements in reading and information processing: 20 years of research
    Rayner, Rayner
  • Reading without a fovea
    Rayner, Rayner; Bertera, Bertera
  • Selective attentional dyslexia
    Rayner, Rayner; Murphy, Murphy; Henderson, Henderson; Pollatsek, Pollatsek
  • Speed‐accuracy trade‐off in recognition memory
    Reed, Reed
  • Attentional load and sensory competition in human vision: Modulation of fMRI responses by load at fixation during task‐irrelevant stimulation in the peripheral visual field
    Schwartz, Schwartz; Vuilleumier, Vuilleumier; Hutton, Hutton; Maravita, Maravita; Dolan, Dolan; Driver, Driver
  • Dyslexia (specific reading disability)
    Shaywitz, Shaywitz; Shaywitz, Shaywitz
  • Deficit of visual contour integration in dyslexia
    Simmers, Simmers; Bex, Bex
  • Directional motion contrast sensitivity in developmental dyslexia
    Slaghuis, Slaghuis; Ryan, Ryan
  • Visual processing deficits in dyslexia: Receptors or neural mechanisms?
    Stuart, Stuart; Lovegrove, Lovegrove
  • Detection of animals in natural images using far peripheral vision
    Thorpe, Thorpe; Gegenfurtner, Gegenfurtner; Fabre‐Thorpe, Fabre‐Thorpe; Bulthoff, Bulthoff
  • Specific reading disability (dyslexia): What have we learned in the past four decades?
    Vellutino, Vellutino; Fletcher, Fletcher; Snowling, Snowling; Scanlon, Scanlon
  • Visual‐spatial strength is dyslexia: Rapid discrimination of impossible figures
    Von Karolyi, Von Karolyi
  • Dyslexia linked to talent: Global visual‐spatial ability
    Von Karolyi, Von Karolyi; Winner, Winner; Gray, Gray; Sherman, Sherman
  • Cognitive load and the functional field of view
    Williams, Williams
  • Peripheral target recognition and visual field narrowing in aviators and nonaviators
    Williams, Williams
  • Dyslexia and visual‐spatial talents: Compensation vs deficit model
    Winner, Winner; Von Karolyi, Von Karolyi; Malinsky, Malinsky; French, French; Seliger, Seliger; Ross, Ross
  • The prevalence of dyslexia among art students
    Wolff, Wolff; Lundberg, Lundberg