Neurocognitive and Linguistic Deficits in Developmental Dyslexia
DOI:
https://doi.org/10.56511/JIPBS.2015.v2.i04.pp653-659Abstract
Background: It has been suggested that dyslexic individuals manifest difficulties in phonological awareness, rapid naming, morphological awareness, and short-term memory. Nevertheless, the percentage of these difficulties varied among languages. Materials and Methods: A group of children who have developmental dyslexia, aged from 6.5 to 10 years, were investigated to determine the percentage of neurocognitive and linguistic deficits in Arabic speaking dyslexic individuals. Results: Rapid automatized naming was found to be the most common deficit occurring in all participants. Other linguistic, auditory, visual and memory difficulties were noticed. The percent of deficits in their abilities was determined and discussed. Conclusion: The present study suggested that dyslexia is a complex neurodevelopmental disorder rather than a simple disorder related to a phoneme-grapheme correspondence disorder. Furthermore, it emphasized the importance of thorough assessment of different neurocognitive and linguistic abilities using different scales and detailed tests for better design of remediation programs for children having developmental dyslexia.
Keywords:
Developmental dyslexia, cognition, language, deficitsDownloads
References
Ho CS, Chan DW, Lee SH, Tsang SM and Luan VH. Cognitive profiling and preliminary subtyping in Chinese developmental dyslexia. Cognition 2004; 91(1):43-75.
Chung K, Ho C, Chan D, Tsang S and Lee S. Cognitive skills and literacy performance of Chinese adolescents with and without dyslexia. Read Writ 2011; 24(7): 835-859.
Aboras Y, Abdou R andKozou H. Development of an Arabic test for assessment of dyslexia in Egyptian children. Bulletin of Alexandria Faculty of Medicine 2008; 44 (3): 653-662.
Fawcett AJ and Nicolson RI. The Dyslexia Screening Test. London: The Psychological Corporation.1996.
Melika L. Stanford Binet Intelligence Scale (4th edition, Arabic version). Second edition. Cairo: Victor Kiorlos Publishing. 1998.
Thorndike RL,Hagen EP, and Sattler JM. Stanford-Binet Intelligence Scale: Fourth Edition. Chicago: Riverside, 1986b.
El-SadyS, El-ShobaryA, RifaieNand AzzamA. Illinois test of psycholinguistic abilities, Phoniatrics unit, Department of Otorhinolaryngology, Ain Shams University,Cairo, Egypt. 1996.
Kirk S, McCarthy J, Kirk W. The Illinois test of psycholinguistic abilities. Urbana, IL: University of Illinois Press. 1968.
Kotby M, Khairy A, Barakah M, Rifaie N and El-Shobary A. Language testing of Arabic speaking children. Proceeding of the XVIII World Congress of the International Association of Logopedics and Phoniatrics (WCIALP`95) 1995; 263266.
El-Sady S, El-Shoubary A, El-Assal N, Abou-Elsaad T, Afsah O. The efficacy of a language-based training program as a Phoniatric approach for remediation of Egyptian learning-disabled children. Thesis submitted for partial fulfillment of the doctoral degree in Phoniatrics. Ain – Shams University, Cairo, Egypt. 2011.
El-Sady S, El-Shoubary A, El-Assal N, Abou-Elsaad T, Afsah O. Development of a screening test battery for assessing phonological awareness in Arabicspeaking children in the early elementary grades. Ain Shams Medical Journal 2011; 62 (1, 2, 3): 95-103.
Lyon GR, Shaywitz SE andShaywitz BA. A definition of dyslexia. Ann Dyslexia 2003; 53: 1-14.
Menghini D, Finzi A, Benassi M, Bolzani R, Facoetti A, Giovagnoli S, Ruffino M andVicari S. Different underlying neurocognitive deficits in developmental dyslexia: a comparative study. Neuropsychologia 2010;48(4):863-72.
Supple M de M. Dyslexia: Oral and Written Language Disorder. Folia PhoniatrLogop 2000; 52: 7 – 13.
Schulz E, Maurer U, Mark SV, Bucher K, Brem S, Martin E and Brandeis D. Impaired semantic processing during sentence reading in children with dyslexia: combined fMRI and ERP evidence. NeuroImage 2008; 41(1):15368.
Cantiania C, Lorussoa ML, Guastib MT, Sabischc B andMännelc C. Characterizing the morphosyntactic processing deficit and its relationship to phonology in developmental dyslexia Neuropsychologia 2013; 51 (8): 1595-1607.
Ortiza R, Estéveza A, Muñetónb M andDomíngueza C. Visual and auditory perception in preschool children at risk for dyslexia. Research in Developmental Disabilities 2014; 35 (11): 2673-2680.
Moura O, Simões MR and Pereira M. Working memory in Portuguese children with developmental dyslexia. ApplNeuropsychol Child 2014; 15:1-12.
Trecya M, Stevea M and Martine P. Impaired short-term memory for order in adults with dyslexia. Research in Developmental Disabilities 2013; 34 (7): 2211-2223.
Willcutt EG, Petrill SA, Wu S, Boada R, Defries JC, Olson RK and Pennington BF. Comorbidity between reading disability and math disability: concurrent psychopathology, functional impairment, and neuropsychological functioning. J Learn Disabil 2013; 46(6):500-516.
Cao F, Peng D, Liu L, Jin Z, Fan N, Deng Y and Booth J. Developmental differences of neurocognitive networks for phonological and semantic processing in Chinese word reading. Hum Brain Mapp 2009; 30(3): 797-809.
Sandak R, Mencl W, Frost S and Pugh KR. The neurobiological basis of skilled and impaired reading: Recent findings and new directions. Sci Stud Read 2004; 8:273-292.
Raschle NM, Chang M andGaab N. Structural brain alterations associated with dyslexia predate reading onset. Neuroimage 2011; 57(3):742-749.
Steinbrink C, Groth K, Lachmann T and Riecker A. Neural correlates of temporal auditory processing in developmental dyslexia during German vowel length discrimination: an fMRI study. Brain Lang 2012; 121(1):1-11.
Rutter M, Caspi A, Fergusson D, Horwood LJ, Goodman R, MaughnB, Moffitt TE, Meltzer H and Carroll J. Sex differences in developmental reading disability: New findings from 4 epidemiological studies. The Journal of the American Medical Association 2004; 291:2007 – 2012.
Published
How to Cite
Issue
Section
Copyright (c) 2015 Houriah Ahmad Allam, EhabRagaa Abdelraouf, Mohamed Fathy, Neveen Hassan Nashaat

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.


Journal of Innovations in Pharmaceutical and Biological Sciences is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Based on a work at