Published December 10, 2012
| Version v1
Journal article
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Predictors of developmental dyslexia in European orthographies with varying complexity
Authors/Creators
- Landerl, Karin
-
Ramus, Franck
- Lyytinen, Heikki
- Moll, Kristina
- Leppänen, Paavo H. T.
- Lohvansuu, Kaisa
- O’Donovan, Michael
- Williams, Julie
- Bartling, Jürgen
- Bruder, Jennifer
- Kunze, Sarah
- Neuhoff, Nina
- Tóth, Dénes
- Honbolygó, Ferenc
- Bogliotti, Caroline
- Csépe, Valéria
- Iannuzzi, Stéphanie
- Chaix, Yves
- Démonet, Jean-François
- Longeras, Emilie
- Valdois, Sylviane
- Chabernaud, Camille
- Delteil-Pinton, Florence
- Billard, Catherine
- George, Florence
- Ziegler, Johannes C.
- Comte-Gervais, Isabelle
- Soares-Boucaud, Isabelle
- Gérard, Christophe-Loïc
- Blomert, Leo
- Vaessen, Anniek
- Gerretsen, Patty
- Ekkebus, Michel
- Brandeis, Daniel
- Maurer, Urs
- van der Mark, Sanne
- Schulz, Enrico
- Müller-Myhsok, Bertram
- Schulte-Körne, Gerd
Description
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.
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