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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 ORCID: https://orcid.org/0000-0001-7073-2379, Williams, Julie ORCID: https://orcid.org/0000-0002-4069-0259, 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: 31 Oct 2022 09:32
URI: https://orca.cardiff.ac.uk/id/eprint/81442

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