Spatial Attention Shifting and Phonological Processing in Adults with Dyslexia

Ian Abbott, Rebecca F Larkin, Andrew K Dunn

Abstract


We assessed whether a group of adults with dyslexia showed impaired performance on shifting visual spatial attention, as per Hari and Renvall’s (2001) sluggish attentional shifting (SAS) hypothesis. Twelve adults with dyslexia and 12 controls took part in the experiment and  completed  standardised measures of single word reading, spelling, IQ, phonological processing, speed of processing and non-word reading.  Attention orienting was measured using a version a task developed by Schul et al., (2004), which yields accuracy and reaction time data.  Overall, the dyslexic participants showed the same pattern of performance as the control participants on the attention orienting task, but completed the tasks at a consistently slower pace.  Further attention shifting was not a significant unique predictor of non-word reading performance after age, general ability and speed of processing had been controlled. The findings suggest that a deficit in cognitive processing speed may characterise dyslexia alongside core difficulties with phonological awareness.


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References


Bonifacci, P. & Snowling, M.J. (2008). Speed of processing and reading disability: A cross-linguistic investigation of dyslexia and borderline intellectual functioning. Cognition, 107, 999 – 1017.

Brunn, J.L. & Farah, M.J. (1991). The relation between spatial attention and reading: Evidence from the neglect syndrome. Cognitive Neuropsychology, 8, 59 – 75.

Buchholz, J. & Davies, A.A. (2005). Adults with dyslexia demonstrate space-based and object-based covert attention deficits : Shifting attention to the periphery and ahifting attention between objects in the left visual field. Brain and Cognition, 57, 30 – 34.

Buchholz, J., & McKone, E. (2004). Adults with dyslexia show deficits on spatial frequency doubling illusion and visual attention task. Dyslexia, 10, 24 – 43.

Carroll, J.M., & Snowling, M.J. (2004). Language and phonological skills in children at high risk of reading difficulties. Journal of Child Psychology and Psychiatry, 45, 631 – 640.

Casco, C. & Prunetti, E. (1996). Visual search of good and poor readers: effects with targets having single and combined features. Perceptual and Motor Skills, 82, 1155 – 1167.

Catts, H.W., Gillispie, M., Leonard, L.B., Kail, R.V. & Miller, C.A. (2002). The role of speed of processing, rapid naming, and phonological awareness in reading achievement. Journal of Learning Disabilities, 35, 509 – 524.

Coltheart, M., Curtis, B., Atkins, P., & Haller, M. (1993). Models of reading aloud: Dual-route and parallel-distributed-processing approaches. Psychological Review, 100, 589 – 608.

{{242 Ehri, Linnea C 1992}}Ehri, L. (1992). Reconceptualising the development of sight word reading and its relationship to recoding. In P.Gough, L.Ehri & R. Treiman (Eds.), Reading acquisition (pp. 107 – 143). Hillsdale, NJ: Lawrence Erlbaum Associates, Inc.

Facoetti, A., Lorusso, M.L., Cattaneo, C., Galli, R. & Molteni, M. (2005). Visual and auditory attentional capture are both sluggish in children with developmental dyslexia. Acta Neurobiologiae Experimentalis, 65, 61 – 72.

Facoetti, A., Ruffino, M., Peru, A., Paganoni, P. & Chelazzi, L. (2008). Sluggish engagement and disengagement of non-spatial attention in dyslexic children. Cortex, 44, 1221 – 1233.

Frith, U. (1985). Beneath the surface of developmental dyslexia. In K.E. Patterson, J.C. Marshall & M. Coltheart (Eds.), Surface dyslexia: neuropsychological and cognitive studies of phonological reading (pp.301 – 330). London: Lawrence Erlbaum Associates, Inc.

Georgiewa , P., Rzanny, R., Gaser, C., Gerhard, U., Vieweg, U., Freesmeyer, D., et al. (2002). Phonological processing in dyslexic children: a study combining functional imaging and event related potentials. Neuroscience Letters, 318, 5 – 8.

Goswami, U. (2003). Why theories about developmental dyslexiarequire developmental designs. Trends in Cognitive Sciences, 7, 534 – 540.

Griffiths, Y. & Snowling, M. J. (2002). Predictors of nonword reading and dyslexia. Journal of Educational Psychology, 94, 34 – 43.

Hari, R., & Renvall, H. (2001). Impaired processing of rapid stimulus sequences in dyslexia. Trends in Cognitive Sciences, 5, 525 – 532.

Hari, R., Valta, M. & Uutela, K. (1999). Prolonged attentional dwell time in dyslexic adults. Neuroscience Letters, 271, 202 – 204.

Heiervang, E. & Hugdahl, K. (2003). Impaired visual attention in children with dyslexia. Journal of Learning Disabilities, 36, 68 – 73.

Holm, S. (1979). A simple sequential rejective multiple test procedure. Scandinavian Journal of Statistics, 6, 65-70.

Iles, J., Walsh, V. & Richardson, A. (2000). Visual search performance in dyslexia. Dyslexia, 6, 163 – 177.

Kail, R. & Hall, L.K. (1994). Processing speed, naming speed and reading. Developmental Psychology, 30, 949 – 954.

Mayall, K., Humphreys, G.W., Mechelli, A., Olson, A. & Price, C., (2001). The effects of case mixing on word recognition: Evidence from a PET study. Journal of Cognitive Neuroscience, 13, 844 – 853.

Mayringer, H. & Wimmer, H. (2000). Pseudoname learning by German speaking children with dyslexia: Evidence for a phonological learning deficit. Journal of Experimental Child Psychology, 75, 116 – 133.

Nicolson, R. I. (1994). Reaction times and dyslexia. The Quarterly Journal of Experimental Psychology Section A, 47, 29 – 48.

Olejnik, S. & Algina, J. (2003). Generalized Eta and Omega Squared Statistics: Measures of Effect size for some common research designs. Psychological Methods, 8, 434-447.

Paulesu, E., Démonet, J.F., Fazio, F., McCrory, Chanoine, V., Brunswick, N., et al. (2001). Dyslexia: Cultural diversity and biological unity. Science, 16, 2165 – 2167.

Pennington, B., Lefly, D. L. (2003). Early reading development in children at family risk for dyslexia. Child Development, 72, 816 – 833.

Pennington, B.F., Van Orden, G.C., Smith, S.D., Green, P.A. & Haith, M.M. (1990). Phonological processing skills and deficits in adult dyslexics. Child Development, 61, 1753 – 1778.

Perin, D. (1983). Phonemic segmentation and spelling. British Journal of Psychology, 74, 129 – 144.

Posner, M.I. (1980). Orienting of attention. The Quarterly Journal of Experimental Psychology, 32, 3 – 25.

Ramus, F., Rosen, S., Dakin, S.C., Day, B.L., Castellote, J.M., White, S. & Frith, U. (2003). Theories of developmental dyslexia: insights from a multiple case study of dyslexic adults. Brain, 126, 841 – 865

Roach, N.W. & Hogben, J.H. (2004). Attentional modulation of visual processing in adult dyslexia: A spatial cuing deficit. Psychological Science, 10, 650 - 654

Ruddock, K.H. (1991). Visual search and dyslexia. In J.F. Stein (Ed.), Vision and Visual Dyslexia (pp. 58 – 79). London: MacMillan Press.

Scarborough, H. S. (1990). Very early language deficits in dyslexic children. Child Development, 61, 1728 – 1743.

Schul, R., Stiles, J., Wulfeck, B. & Townsend, J. (2004). How ‘generalised’ is the ‘slowed processing’ in SLI? The case of visuospatial attentional orienting. Neuropsychologia, 42, 661 – 671.

Shastry, B.S. (2007). Developmental dyslexia: An update. Journal of Human Genetics, 52, 104 - 109

Stoet, G., Markey, H. & López (2007). Dyslexia and attentional shifting. Neuroscience Letters, 427, 61 – 65.

Snowling, M. (2000). Dyslexia (2nd edition). Oxford: Blackwell.

Snowling, M. J., Stothard, S.E. & Mclean, J. (1996). The Graded Nonword Reading Test. Reading, U.K.: Thames Valley Test Company.

Temple, E., Poldrack, R.A., Salidis, J., Deutsch, G.K., Tallal, P., Merzenich, M.M. et al. (2001). Dirupted neural responses to phonological orthographic processing in dyslexic children: an fMRI study. Neuroreport, 12, 299 – 307.

Valdois, S., Bosse, M.L., Ans, B., Carbonnel, S., Zorman, M., David, D., et al., (2003). Phonological and visual processing deficits can dissociate in developmental dyslexia : Evidence from two case studies. Reading and Writing, 16, 541 – 572.

Visser, T.A.W., Boden, C. & Giaschi, D.E. (2004). Children with dyslexia: evidence for visual attention deficits in perception of rapid sequences of objects. Vision Research, 44, 2521 – 2535.

White, S., Milne, E., Rosen, S., Hansen, P., Swelttenham, J. Frith, U. et al. (2006). The role of sensorimotor impairments in dyslexia: a multiple case study of dyslexic children. Developmental Science, 9, 237 – 255.

Wechsler, D. (1997). Wechsler Adult Intelligence Scale III. San Antoinio, TX. The Psychological Corporation.

Wilkinson, G.S. & Robertson, G.J. (2006). Wide Range Achievement Test Professional Manual. Lutz, FL: Psychological Assessment Resources.

Williams, M.C., Brannan, J.R. & Lartirgue, E.K. (1987). Visual search in good and poor readers. Clinical Vision Science, 1, 367 – 371.

Wimmer, H., Hutzler, F. & Wiener, C. (2002). Children with dyslexia and right parietal lobe dysfunction: event-related potentials in response to words and pseudowords. Neuroscience Letters, 331, 211 – 213.


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