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Predictors of developmental dyslexia in European orthographies with varying complexity

Landerl, K., Ramus, F., Moll, K., Lyytinen, H., Leppänen, P., Lohvansuu, K., O'Donovan, Michael Conlon, Williams, Julie, Bartling, J., Bruder, J., Kunze, S., Neuhoff, N., Tóth, D., Honbolygó, F., Csépe, V., Bogliotti, C., Iannuzzi, S., Chaix, Y., Démonet, J., Longeras, E., Valdois, S., Chabernaud, C., Delteil-Pinton, F., Billard, C., George, F., Ziegler, J., Comte-Gervais, I., Soares-Boucaud, I., Gérard, C., Blomert, L., Vaessen, A., Gerretsen, P., Ekkebus, M., Brandeis, D., Maurer, U., Schulz, E., van der Mark, S., Müller-Myhsok, B. and Schulte-Körne, G. 2013. Predictors of developmental dyslexia in European orthographies with varying complexity. Journal of Child Psychology and Psychiatry 54 (6) , pp. 686-694. 10.1111/jcpp.12029

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Abstract

Background: The relationship between phoneme awareness, rapid automatized naming (RAN), verbal short-term/working memory (ST/WM) and diagnostic category is investigated in control and dyslexic children, and the extent to which this depends on orthographic complexity. Methods: General cognitive, phonological and literacy skills were tested in 1,138 control and 1,114 dyslexic children speaking six different languages spanning a large range of orthographic complexity (Finnish, Hungarian, German, Dutch, French, English). Results: Phoneme deletion and RAN were strong concurrent predictors of developmental dyslexia, while verbal ST/WM and general verbal abilities played a comparatively minor role. In logistic regression models, more participants were classified correctly when orthography was more complex. The impact of phoneme deletion and RAN-digits was stronger in complex than in less complex orthographies. Conclusions: Findings are largely consistent with the literature on predictors of dyslexia and literacy skills, while uniquely demonstrating how orthographic complexity exacerbates some symptoms of dyslexia.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Medicine
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > R Medicine (General)
R Medicine > RZ Other systems of medicine
Uncontrolled Keywords: Awareness; Child; Cross-Cultural Comparison; Dyslexia; Europe; Female; Humans; Male; Memory, Short-Term; Neuropsychological Tests; Phonetics; Psycholinguistics; Psychometrics; Reference Values; Semantics; Verbal Behavior; Verbal Learning; Vocabulary
Publisher: Wiley-Blackwell
ISSN: 0021-9630
Last Modified: 04 Jun 2017 08:37
URI: http://orca.cf.ac.uk/id/eprint/81442

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