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Proceedings of the National Academy of... Oct 2012
Topics: Dyslexia; Humans; Pattern Recognition, Visual; Reading
PubMed: 22961254
DOI: 10.1073/pnas.1212877109 -
Arquivos de Neuro-psiquiatria Feb 2012
Topics: Attention; Attention Deficit Disorder with Hyperactivity; Dyslexia; Female; Humans; Male; Neuropsychological Tests
PubMed: 22311208
DOI: 10.1590/s0004-282x2012000200001 -
Pediatric Research Oct 2022Literacy is a major social determinant of health, rooted in skills that develop during early childhood. Children arriving at kindergarten unprepared to learn to read are... (Review)
Review
Literacy is a major social determinant of health, rooted in skills that develop during early childhood. Children arriving at kindergarten unprepared to learn to read are more likely to have low reading proficiency thereafter. General and health literacy are highly correlated, affecting understanding of health conditions, treatment adherence, and transition to self-care and adult healthcare services. The American Academy of Pediatrics (AAP) recommends literacy and school readiness promotion during well-visits and neurodevelopmental surveillance is emphasized across primary and subspecialty care. While genetic and environmental risk factors for reading difficulties are well-established, risks related to complex and chronic medical conditions are less appreciated and under-researched. This review applies an eco-bio-developmental framework to explore literacy across five complex chronic conditions affecting millions of children worldwide: asthma, cancer, congenital heart disease, epilepsy, and sickle cell disease. In each, integration of an efficient reading brain network may be impacted by direct factors, such as ischemia, anesthesia, and/or medications, and also indirect factors, such as altered parent-child routines, hospital stays, and missed school. By integrating literacy into care management plans for affected children, pediatric primary care and specialty providers are poised to identify risks early, target guidance and interventions, and improve academic and health outcomes. IMPACT: While genetic and environmental risk factors for reading difficulties are well-established, risks related to complex and/or chronic medical conditions such as asthma, cancer, congenital heart disease, epilepsy, and sickle cell disease are substantial, less appreciated, and under-researched. General and health literacy are highly correlated, with implications for the understanding one's health condition, treatment adherence, and transitioning to self-care, which is especially important for children with complex and/or chronic illness. Pediatric primary care and specialty providers are poised to integrate reading and literacy into care management plans for children with complex and/or chronic illness, including early screening, guidance, support, and interventions.
Topics: Child; Humans; Child, Preschool; United States; Asthma; Chronic Disease; Pediatrics; Anemia, Sickle Cell; Dyslexia
PubMed: 35121848
DOI: 10.1038/s41390-022-01934-y -
Dyslexia (Chichester, England) Feb 2020Auditory frequency discrimination has been used as an index of sensory processing in developmental language disorders such as dyslexia, where group differences have... (Meta-Analysis)
Meta-Analysis Review
Auditory frequency discrimination has been used as an index of sensory processing in developmental language disorders such as dyslexia, where group differences have often been interpreted as evidence for a basic deficit in auditory processing that underpins and constrains individual variability in the development of phonological skills. Here, we conducted a meta-analysis to evaluate the cumulative evidence for group differences in frequency discrimination and to explore the impact of some potential moderator variables that could contribute to variability in effect-size estimations across studies. Our analyses revealed mean effect sizes for group differences on frequency discrimination tasks on the order of three-quarters of a standard deviation, but in the presence of substantial inter-study variability in their magnitude. Moderator variable analyses indicated that factors related both to participant variability on behavioural and cognitive variables associated with the dyslexia phenotype, and to variability in the task design, contributed to differences in the magnitude of effect size across studies. The apparently complex pattern of results was compounded by the lack of concurrent, standardised metrics of cognitive and reading component skills across the constituent studies. Differences on sensory processing tasks are often reported in studies of developmental disorders, but these need to be more carefully interpreted in the context of non-sensory factors, which may explain significant inter- and intra-group variance in the dependent measure of interest.
Topics: Auditory Perception; Cognition; Dyslexia; Humans; Language Development Disorders; Linguistics
PubMed: 31877576
DOI: 10.1002/dys.1645 -
Sensors (Basel, Switzerland) Jun 2022Considering the detrimental effects of dyslexia on academic performance and its common occurrence, developing tools for dyslexia detection, monitoring, and treatment...
Considering the detrimental effects of dyslexia on academic performance and its common occurrence, developing tools for dyslexia detection, monitoring, and treatment poses a task of significant priority. The research performed in this paper was focused on detecting and analyzing dyslexic tendencies in Serbian children based on eye-tracking measures. The group of 30 children (ages 7-13, 15 dyslexic and 15 non-dyslexic) read 13 different text segments on 13 different color configurations. For each text segment, the corresponding eye-tracking trail was recorded and then processed offline and represented by nine conventional features and five newly proposed features. The features were used for dyslexia recognition using several machine learning algorithms: logistic regression, support vector machine, k-nearest neighbor, and random forest. The highest accuracy of 94% was achieved using all the implemented features and leave-one-out subject cross-validation. Afterwards, the most important features for dyslexia detection (representing the complexity of fixation gaze) were used in a statistical analysis of the individual color effects on dyslexic tendencies within the dyslexic group. The statistical analysis has shown that the influence of color has high inter-subject variability. This paper is the first to introduce features that provide clear separability between a dyslexic and control group in the Serbian language (a language with a shallow orthographic system). Furthermore, the proposed features could be used for diagnosing and tracking dyslexia as biomarkers for objective quantification.
Topics: Child; Dyslexia; Eye-Tracking Technology; Humans; Language; Reading; Recognition, Psychology
PubMed: 35808394
DOI: 10.3390/s22134900 -
Dyslexia (Chichester, England) Aug 2018Given that an estimated 5-10% of the worldwide population is said to have dyslexia, it is of great importance that teachers have an accurate understanding of what...
Given that an estimated 5-10% of the worldwide population is said to have dyslexia, it is of great importance that teachers have an accurate understanding of what dyslexia is and how it effects their students. Using results from a large-scale survey of teachers in England and in Wales (N ≈ 2,600), this paper demonstrates that teachers held a basic understanding of dyslexia, based on the behavioural issues that it is associated with. Teachers lacked the knowledge of the biological (i.e., neurological) and cognitive (i.e., processing) aspects of dyslexia. Moreover, a number of teachers mentioned visual factors in their description of dyslexia, despite there being inconclusive evidence to suggest a direct relationship between visual functioning and dyslexia. Further findings demonstrate the importance of good-quality teacher training in increasing teachers' confidence working with those with dyslexia, while increasing their knowledge of the cognitive aspects of dyslexia. This paper argues that evidence-based teacher training, which informs teachers of the up-to-date research on the biological, cognitive, and behavioural aspects of dyslexia, is essential to combat misconceptions and ensure that teachers have more nuanced and informed understandings of dyslexia.
Topics: Dyslexia; Female; Health Knowledge, Attitudes, Practice; Humans; Male; School Teachers; Surveys and Questionnaires; Teacher Training
PubMed: 30019501
DOI: 10.1002/dys.1593 -
Clinical & Experimental Optometry Jul 2008Optometrists will frequently see patients, who may have a diagnosis or a suspected diagnosis of dyslexia (specific reading disorder) and will need to manage and counsel... (Review)
Review
Optometrists will frequently see patients, who may have a diagnosis or a suspected diagnosis of dyslexia (specific reading disorder) and will need to manage and counsel such patients. There are many propounded theories on the cause(s) of dyslexia. Although most professionals in this area consider that dyslexia is chiefly a linguistic disorder, the possibility of a visual component is contentious. This article is a selective review of two commonly discussed theories that suggest a visual component in dyslexia; the magnocellular deficit theory and Meares-Irlen syndrome.
Topics: Asthenopia; Dyslexia; Flicker Fusion; Humans; Optometry; Perceptual Disorders; Perceptual Distortion; Professional Role; Vision, Ocular; Visual Pathways
PubMed: 18430036
DOI: 10.1111/j.1444-0938.2008.00277.x -
Dyslexia (Chichester, England) Aug 2022Educational experiences often influence self-concept. Thus, readers with dyslexia can have low self-esteem and self-efficacy, and perceive themselves as less intelligent...
Educational experiences often influence self-concept. Thus, readers with dyslexia can have low self-esteem and self-efficacy, and perceive themselves as less intelligent than their peers. They may develop creativity to succeed despite their difficulties but findings are inconsistent and rarely consider the effect of age of assessment on self-perception. This study included 145 university students (Mage = 24.43 years), 72 with dyslexia; of these, 53% had been assessed in childhood (Mage = 11.89 years), 47% in adulthood (Mage = 27.38 years). A survey assessed self-esteem, self-efficacy, creativity and estimated intelligence. Students with dyslexia reported lower levels of self-esteem, self-efficacy and estimated intelligence. When assessment age was considered, those assessed early displayed lower self-esteem and self-efficacy but no difference in estimated intelligence. Those assessed late displayed lower estimated intelligence and self-esteem but no difference in self-efficacy. Findings highlight the importance of providing psychological support to students with dyslexia to enhance their self-perceptions.
Topics: Adult; Creativity; Dyslexia; Humans; Self Concept; Students; Universities
PubMed: 35818173
DOI: 10.1002/dys.1722 -
Dyslexia (Chichester, England) Aug 2022When dyslexia is diagnosed late, the question is whether this is due to late-emerging (LE) or late-identified (LI) problems. In a random selection of dyslexia-diagnosis...
When dyslexia is diagnosed late, the question is whether this is due to late-emerging (LE) or late-identified (LI) problems. In a random selection of dyslexia-diagnosis case files we distinguished early-diagnosed (Grade 1-3, n = 116) and late-diagnosed (Grade 4-6) dyslexia. The late-diagnosed files were divided into LE (n = 54) and LI dyslexia (n = 45). The LE group consisted of children whose national-curriculum literacy outcomes did not warrant referral for dyslexia diagnosis in Grades 1-2; the LI group of children whose literacy outcomes did, but who were referred for diagnostic assessment after Grade 3. At the time of diagnosis, the percentage of poor performers on word-level literacy measures generally did not differ between the groups. Only the LE group contained fewer poor performers than the early-diagnosed and LI group on some word-reading measures. All groups showed similar distributions of phonological difficulties. There were no indications of compensation through vocabulary, memory or IQ in either late-diagnosed group. Our diagnosis-based study confirms and extends previous research-based studies on LE dyslexia. Moreover, it shows that LI dyslexia exists, which can be regarded as the existence of instructional casualties. The findings speak to issues of identification, diagnosis and compensation and call for further efforts to improve the early identification of dyslexia.
Topics: Child; Dyslexia; Humans; Linguistics; Literacy; Phonetics; Reading; Vocabulary
PubMed: 35586881
DOI: 10.1002/dys.1712 -
Neuropsychological Rehabilitation Jun 2018Phonological alexia and agraphia are written language disorders characterised by disproportionate difficulty reading and spelling nonwords in comparison to real words....
Phonological alexia and agraphia are written language disorders characterised by disproportionate difficulty reading and spelling nonwords in comparison to real words. In phonological alexia, it has been shown that, despite relatively accurate reading of words in isolation, text-level reading deficits are often marked and persistent. Specifically, some individuals demonstrate difficulty reading functors and affixes in sentences, a profile referred to as phonological text alexia. In this paper, we demonstrate an analogous manifestation of the phonological impairment on text-level writing and suggest the term "phonological text agraphia". We examined four individuals with phonological alexia/agraphia who also showed disproportionate difficulty writing well-formed sentences in comparison to their grammatical competence in spoken utterances. Implementation of a phonological treatment protocol resulted in significantly improved sublexical phonology skills as well as improvements in grammatical accuracy of written narratives. These findings support the notion of a common phonological impairment underlying nonword reading/spelling deficits and sentence-level difficulties.
Topics: Adult; Aged; Agraphia; Dyslexia; Female; Humans; Language Therapy; Male; Middle Aged; Neuropsychological Tests; Phonetics; Stroke; Treatment Outcome
PubMed: 27392251
DOI: 10.1080/09602011.2016.1199387