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Assessing Dyslexia at Six Year of Age
Published on: May 1, 2020
Characterizing the morphosyntactic processing deficit and its relationship to phonology in developmental dyslexia
Chiara Cantiani1, Maria Luisa Lorusso, Maria Teresa Guasti
1Scientific Institute E. Medea, Child Psychopathology Unit - Neuropsychology of Developmental Disorders, Bosisio Parini, Italy. chiara.cantiani@bp.lnf.it
Neuropsychologia
|May 1, 2013
Summary
Developmental dyslexia involves morphosyntactic processing difficulties, particularly with lexical and inflectional changes. While phonological deficits are present, their direct causal link to morphosyntactic issues in dyslexia remains inconclusive.
Area of Science:
- Neuroscience
- Linguistics
- Developmental Psychology
Background:
- Developmental dyslexia is debated to have linguistic roots.
- Underlying processing difficulties like phonological impairments are hypothesized.
- Morphosyntactic processing in dyslexia requires further investigation.
Purpose of the Study:
- To explore the morphosyntactic processing deficit in developmental dyslexia.
- To test the hypothesis that this deficit stems from processing impairments.
- To investigate the interaction between phonological and morphosyntactic processing.
Main Methods:
- Auditory presentation of German sentences with and without morphosyntactic violations.
- Electroencephalography (EEG) recording during sentence processing.
- Manipulation of verbal inflectional acoustic salience.
- Behavioral testing of phonemic awareness and verbal short-term memory.
Main Results:
- Altered morphosyntactic processing in adults with dyslexia was confirmed via event-related potentials (ERPs).
- Processing deficits were more pronounced with combined lexical and inflectional violations.
- Phonological deficits were identified in dyslexic participants through ERPs and behavioral data.
Conclusions:
- Morphosyntactic processing is indeed altered in developmental dyslexia.
- Phonological deficits are present but do not solely explain morphosyntactic anomalies.
- Morphosyntactic processing in dyslexia correlates with higher-level phonological skills and lexical cues, not acoustic salience.
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