Submission 315
Behavioural Manifestations of Dyslexia: From Phonological Awareness to Working Memory and Speech Production
SymposiumTalk-02
Presented by: Sabrina Turker
Dyslexia is typically defined by difficulties in accurate and fluent word recognition, yet behavioural evidence suggests that these challenges extend across multiple linguistic and cognitive domains. Across several studies, we investigated how phonological awareness, verbal working memory, and speech production interact in shaping the behavioural profile of dyslexia. Children with dyslexia performed poorly on various language learning and working memory tasks, with major deficits in non-word span, phonetic memory and vocabulary learning. Especially children with additional attention deficits showed more severe working memory deficits and weaknesses in non-language domains. Follow-up research identified spelling, word reading, and phonological awareness as the strongest predictors of dyslexia in adults, alongside a markedly heterogeneous behavioural profile - even low-level deficits persisted into adulthood despite the shallow nature of the German orthographic system. Our most recent findings extend this framework to speech production: acoustic analyses show subtle but systematic differences in articulatory variability between adults with and without dyslexia. Specifically, individuals with dyslexia exhibited less distinct voicing contrasts and slightly reduced category compactness, suggesting persistent imprecision in phonetic implementation.