Specific reading disability (dyslexia): what have we learned in the past four decades?
2004/01/01 by Frank R. Vellutino, Jack M. Fletcher, Jack Μ. Fletcher +2 · 55 citations
Psychology · Neuroscience · Mathematics · #Reading and Literacy Development #Neurobiology of Language and Bilingualism #Cognitive and developmental aspects of mathematical skills
paper · doi:10.1046/j.0021-9630.2003.00305.x
Abstract
We summarize some of the most important findings from research evaluating the hypothesized causes of specific reading disability ('dyslexia') over the past four decades. After outlining components of reading ability, we discuss manifest causes of reading difficulties, in terms of deficiencies in component reading skills that might lead to such difficulties. The evidence suggests that inadequate facility in word identification due, in most cases, to more basic deficits in alphabetic coding is the basic cause of difficulties in learning to read. We next discuss hypothesized deficiencies in reading-related cognitive abilities as underlying causes of deficiencies in component reading skills. The evidence in these areas suggests that, in most cases, phonological skills deficiencies associated with phonological coding deficits are the probable causes of the disorder rather than visual, semantic, or syntactic deficits, although reading difficulties in some children may be associated with general language deficits. Hypothesized deficits in general learning abilities (e.g., attention, association learning, cross-modal transfer etc.) and low-level sensory deficits have weak validity as causal factors in specific reading disability. These inferences are, by and large, supported by research evaluating the biological foundations of dyslexia. Finally, evidence is presented in support of the idea that many poor readers are impaired because of inadequate instruction or other experiential factors. This does not mean that biological factors are not relevant, because the brain and environment interact to produce the neural networks that support reading acquisition. We conclude with a discussion of the clinical implications of the research findings, focusing on the need for enhanced instruction.
Citations
Cited by
- Speech perception problems in Chinese children with reading difficulties: Insights from acoustic context effects
- Research Review: Environmental exposures, neurodevelopment, and child mental health – new paradigms for the study of brain and behavioral effects
- Expanding the Direct and Indirect Effects Model of Writing (DIEW): Reading–writing relations, and dynamic relations as a function of measurement/dimensions of written composition.
- Forty Years of Reading Intervention Research for Elementary Students with or at Risk for Dyslexia: A Systematic Review and Meta‐Analysis
- Oral language deficits in familial dyslexia: A meta-analysis and review.
- White matter microstructure integrity in relation to reading proficiency☆
- Neural dissociation of phonological and visual attention span disorders in developmental dyslexia: FMRI evidence from two case reports
- Superior parietal lobule dysfunction in a homogeneous group of dyslexic children with a visual attention span disorder
- Predicting word reading and comprehension with executive function and speed measures across development: A latent variable analysis.
- Aligning Theory and Assessment of Reading Fluency: Automaticity, Prosody, and Definitions of Fluency
- Mood affective outcomes from alternate learning strategies: cognitive flexibility and dyslexic education
- Neurophysiological responses to phonological and temporal regularities in speech in dyslexic and typical readers
- Defining and understanding dyslexia: past, present and future
- Teaching Spell Checkers to Teach: Pedagogical Program Synthesis for Interactive Learning
- Evidence‐based interventions for reading and language difficulties: Creating a virtuous circle
- Modelling the relationship of accurate and fluent word recognition in primary school
- A comparison of the foreign language learning motivation of Hungarian dyslexic and non‐dyslexic students
- Understanding Dyslexia in the Context of Developmental Language Disorders
- Memory Ability of Children with Complex Communication Needs
- Improvements in reading accuracy as a result of increased interletter spacing are not specific to children with dyslexia
- Phonological deficits in dyslexia impede lexical processing of spoken words: Linking behavioural and MEG data
- A semantic strength and neural correlates in developmental dyslexia
- Verbal short-term memory in developmental dyslexia: The role of the temporoparietal area
- A meta-analysis on the effectiveness of functional literacy interventions for adults
- Reading: The Confluence of Vision and Language
- Threat-Triggering Instructions Modulate the Expression and Amplitude of the Phonological Deficit in Reading of Children With Developmental Dyslexia
- Profiles of phonological deficits and comorbidity in Chinese developmental dyslexia
- Exploring the Overlap Between Dyslexia and Speech Sound Production Deficits
- University Students With Poor Reading Comprehension
- Maturation of speech-elicited event-related potentials from birth to 28 months: Typical development with minor effects of dyslexia risk
- Phonological decoding involves left posterior fusiform gyrus. [europepmc]
- Do children with developmental dyslexia have an implicit learning deficit? [europepmc]
- Reading impairment and visual processing deficits in schizophrenia. [europepmc]
- What influences literacy outcome in children with speech sound disorder? [europepmc]
- Dyslexia: The evolution of a scientific concept. [europepmc]
- Etiology and neuropsychology of comorbidity between RD and ADHD: the case for multiple-deficit models. [europepmc]
- Time perception, phonological skills and executive function in children with dyslexia and/or ADHD symptoms. [europepmc]
- Gray matter volume changes following reading intervention in dyslexic children. [europepmc]
- A multiple deficit model of reading disability and attention-deficit/hyperactivity disorder: searching for shared cognitive deficits. [europepmc]
- Predicting word reading and comprehension with executive function and speed measures across development: a latent variable analysis. [europepmc]
- The relationship between phonological and auditory processing and brain organization in beginning readers. [europepmc]
- Abnormal visual motion processing is not a cause of dyslexia. [europepmc]
- Intact but less accessible phonetic representations in adults with dyslexia. [europepmc]
- Consensus paper: Language and the cerebellum: an ongoing enigma. [europepmc]
- Neuroimaging of reading intervention: a systematic review and activation likelihood estimate meta-analysis. [europepmc]
- Impaired Statistical Learning in Developmental Dyslexia. [europepmc]
- A DTI tractography study in pre-readers at risk for dyslexia. [europepmc]
- Early identification and interventions for dyslexia: a contemporary view. [europepmc]
- Multiple Causal Links Between Magnocellular-Dorsal Pathway Deficit and Developmental Dyslexia. [europepmc]
- Oral language deficits in familial dyslexia: A meta-analysis and review. [europepmc]
- Tackling the 'dyslexia paradox': reading brain and behavior for early markers of developmental dyslexia. [europepmc]
- Research Review: Environmental exposures, neurodevelopment, and child mental health - new paradigms for the study of brain and behavioral effects. [europepmc]
- Understanding Dyslexia in the Context of Developmental Language Disorders. [europepmc]
- Defining and understanding dyslexia: past, present and future. [europepmc]
- Prevalence of Developmental Dyslexia in Primary School Children: A Systematic Review and Meta-Analysis. [europepmc]
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