Dyslexia Research Articles

Anatomical and behavioral correlates of auditory perception in developmental dyslexia.

Developmental dyslexia is typically associated with difficulties in basic auditory processing and in manipulating speech sounds. However, the neuroanatomical correlates of auditory difficulties in developmental dyslexia (DD) and their contribution to individual clinical phenotypes are still unknown. Recent intracranial electrocorticography findings associated processing of sound amplitude rises and speech sounds with posterior and middle superior temporal gyrus (STG), respectively. We hypothesize that regional STG anatomy will relate to specific auditory abilities in DD, and that auditory processing abilities will relate to behavioral difficulties with speech and reading. One hundred and ten children (78 DD, 32 typically developing, age 7-15 years) completed amplitude rise time and speech in noise discrimination tasks. They also underwent a battery of cognitive tests. Anatomical MRI scans were used to identify regions in which local cortical gyrification complexity correlated with auditory behavior. Behaviorally, amplitude rise time but not speech in noise performance was impaired in DD. Neurally, amplitude rise time and speech in noise performance correlated with gyrification in posterior and middle STG, respectively. Furthermore, amplitude rise time significantly contributed to reading impairments in DD, while speech in noise only explained variance in phonological awareness. Finally, amplitude rise time and speech in noise performance were not correlated, and each task was correlated with distinct neuropsychological measures, emphasizing their unique contributions to DD. Overall, we provide a direct link between the neurodevelopment of the left STG and individual variability in auditory processing abilities in neurotypical and dyslexic populations.

Amplitude rise time sensitivity in children with and without dyslexia: differential task effects and longitudinal relations to phonology and literacy.

The speech amplitude envelope carries important acoustic information required for speech intelligibility and contains sensory cues (amplitude rise times, ARTs) that play a key role in both sensory rhythm perception and neural speech encoding. Individual differences in children's sensitivity to ARTs have been related to the development of children's phonological processing skills across languages by the Temporal Sampling theory. Impaired processing of ARTs also characterises children with dyslexia. However, different ART tasks have been employed in different studies, in different languages, and at different ages. Here, we compare the sensitivity of three frequently used ART tasks (based on synthetic syllables, sine tones, and speech-shaped noise) in a longitudinal study of English-speaking children with and without dyslexia. Children's ability to discriminate rising frequency, duration, and intensity was also tested. ART discrimination in all 3 tasks was significantly inter-related, but different relations to phonology and literacy were found for different ART tasks at different ages. In particular, the often-used sine tone and speech-shaped noise ART tasks showed greater sensitivity in older children, while the synthetic syllable task (/ba/ rise) showed greater sensitivity in younger children. Sensitivity to rising frequency was also related to phonology and literacy across ages. The data are interpreted with respect to the Temporal Sampling theory of developmental dyslexia.

Developmental dyslexia genes are selectively targeted by diverse environmental pollutants

BackgroundDevelopmental dyslexia, a complex neurodevelopmental disorder, not only affects children’s academic performance but is also associated with increased healthcare costs, lower employment rates, and reduced productivity. The pathogenesis of dyslexia remains unclear and it is generally considered to be caused by the overlap of genetic and environmental factors. Systematically exploring the close relationship between exposure to environmental compounds and susceptibility genes in the development of dyslexia is currently lacking but high necessary.MethodsIn this study, we systematically compiled 131 publicly reported susceptibility genes for dyslexia sourced from DisGeNET, OMIM, and GeneCards databases. Comparative Toxicogenomics Database database was used to explore the overlap between susceptibility genes and 95 environmental compounds, including metals, persistent organic pollutants, polycyclic aromatic hydrocarbons, and pesticides. Chemical bias towards the dyslexia risk genes was taken into account in the observation/expectation ratios > 1 and the corresponding P value obtained by hypergeometric probability test.ResultsOur study found that the number of dyslexia risk genes targeted by each chemical varied from 1 to 109. A total of 35 chemicals were involved in chemical reactions with dyslexia-associated genes, with significant enrichment values (observed/expected dyslexia risk genes) ranging from 1.147 (Atrazine) to 66.901 (Dibenzo(a, h)pyrene).ConclusionThe results indicated that dyslexia-associated genes were implicated in certain chemical reactions. However, these findings are exploratory, and further research involving animal or cellular experiments is needed.

White matter substrates underlying morphological awareness deficit in Chinese children with developmental dyslexia

BackgroundMorphological awareness (MA) deficit is strongly associated with Chinese developmental dyslexia (DD). However, little is known about the white matter substrates underlying the MA deficit in Chinese children with DD. MethodsIn the current study, 34 Chinese children with DD and 42 typical developmental (TD) children were recruited to complete a diffusion magnetic resonance imaging scan and cognitive tests for MA. We conducted linear regression to test the correlation between MA and DTI metrics, the structural abnormalities of the tracts related to MA, and the interaction effect of DTI metrics by group on MA. ResultsFirst, MA was significant related to the right inferior occipito-frontal fascicle (IFO) and inferior longitudinal fsciculus (ILF), the bilateral thalamo-occipital (T_OCC) and the left arcuate fasciculus (AF); second, compared to TD children, Chinese children with DD had lower axial diffusivity (AD) in the right IFO and T_OCC; third, there were significant interactions between metrics (fractional anisotropy (FA) and radial diffusivity (RD)) of the right IFO and MA in groups. The FA and RD of the right IFO were significantly associated with MA in children with DD but not in TD children. ConclusionIn conclusion, compared to TD children, Chinese children with DD had axonal degeneration not only in the ventral tract (the right IFO) but also the visuospatial tract (the right T_OCC) which were associated with their MA deficit. And Chinese MA involved not only the ventral tracts, but also the visuospatial pathway and dorsal tracts.

Reduced benefit from long-term item frequency contributes to short-term memory deficits in dyslexia.

Dyslexia, a specific difficulty in acquiring proficient reading, is also characterized by reduced short-term memory (STM) capacity. Extensive research indicates that individuals with developmental dyslexia (IDDs) benefit less from exposure, and this hampers their long-term knowledge accumulation. It is well established that long-term knowledge has a great effect on performance in STM tasks, and thus IDDs' reduced benefit of exposure could potentially reduce their relative performance in such tasks, especially when frequent items, such as digit-words, are used. In this study we used a standard, widely used, STM assessment: the Digit Span subtest from the Wechsler Adult Intelligence Scale. The task was conducted twice: in native language and in second language. As exposure to native language is greater than exposure to second language, we predicted that IDDs' performance in the task administered in native language will reveal a larger group difference as compared to second language, due to IDDs' reduced benefit of item frequency. The prediction was confirmed, in line with the hypothesis that reduced STM in dyslexia to a large extent reflects reduced benefits from long-term item frequency and not a reduced STM per se.

Unraveling Brain Synchronisation Dynamics by Explainable Neural Networks using EEG Signals: Application to Dyslexia Diagnosis

The electrical activity of the neural processes involved in cognitive functions is captured in EEG signals, allowing the exploration of the integration and coordination of neuronal oscillations across multiple spatiotemporal scales. We have proposed a novel approach that combines the transformation of EEG signal into image sequences, considering cross-frequency phase synchronisation (CFS) dynamics involved in low-level auditory processing, with the development of a two-stage deep learning model for the detection of developmental dyslexia (DD). This deep learning model exploits spatial and temporal information preserved in the image sequences to find discriminative patterns of phase synchronisation over time achieving a balanced accuracy of up to 83%. This result supports the existence of differential brain synchronisation dynamics between typical and dyslexic seven-year-old readers. Furthermore, we have obtained interpretable representations using a novel feature mask to link the most relevant regions during classification with the cognitive processes attributed to normal reading and those corresponding to compensatory mechanisms found in dyslexia.Graphical

Reframing developmental dyslexia and bilingualism: An overview to enhance strengths and advantages

This paper explores the evolving perceptions of bilingualism and developmental dyslexia, shifting from viewing them as deficits to acknowledging their inherent strengths. This overview contributes to the evolving narrative surrounding dyslexia and bilingualism, urging a revaluation of these conditions from deficit-centered perspectives to recognize the diverse cognitive abilities and adaptive advantages they offer. It delves into the positive aspects associated with developmental dyslexia, highlighting cognitive strengths like visuospatial skills, narrative reasoning, and dynamic reasoning.Additionally, it examines the multifaceted nature of bilingualism, outlining distinctions between types of bilingualism and emphasizing cognitive benefits such as enhanced cognitive flexibility, attentional skills, and executive functions among bilingual individuals. The complexities of language acquisition, socioeconomic factors, and societal support are discussed in understanding the interplay between language acquisition and cognitive development in bilingual contexts. Furthermore, the paper navigates the intricate connection between dyslexia and bilingualism, emphasizing factors like language exposure, linguistic characteristics, and individual cognitive processes that influence their interaction. Dyslexia significantly impacts language acquisition and proficiency in both native and second languages, requiring tailored assessments and interventions for dyslexic bilingual individuals.

Spelling Development of Korean 1st Graders with and without Developmental Dyslexia

Objectives: This study examined the word writing abilities of Korean 1st graders with and without developmental dyslexia (DD) considering meaning accessibility and the structure of a Korean syllable. Methods: Fifteen typically developing children (TD) and fifteen children with developmental dyslexia were assigned word writing tasks in the first and second semesters of the first year. The word writing task contains ten words and ten non-words containing forty syllable-initial and syllable-medial graphemes, and twenty-two syllable-final graphemes. The analysis of the results was conducted in grapheme units, and the accuracy for each word/nonword and the error rate for each structure of a syllable was determined. Results: The DD group showed significant growth in both words/nonwords writing accuracy by the second semester, and the error rates of syllable-initial, syllable-medial, and syllable-final graphemes significantly decreased from the first to the second semester for the DD group. The TD group showed no significant difference in word/non-words writing, and there was no significant difference in error rates according to the structure of a syllable. Both the DD and TD groups showed higher error rates in final graphemes in both the first and second semesters. Conclusion: The word writing abilities of the DD group showed significant growth between the first and second semesters but still had difficulties, particularly in the final grapheme writing. The TD group developed word writing first, and nonword writing was still in development. But final grapheme writing was difficult even for TD group. Follow-up studies are needed to closely observe the developmental processes comparing with decoding level matched TD children.

Automatic metaphor processing in developmental dyslexia

IntroductionPrevious research found metaphor impairments with dyslexia; however, it is unclear if difficulties are due to initial activation of the metaphorical meaning or to subsequent discourse integration processes. The study examines the presence of early automatic processing of metaphors in adults with developmental dyslexia, considering the role of executive functions and metaphor familiarity. MethodsUsing a sentence recall task and a semantic judgment task from the Metaphor Interference Effect (MIE) paradigm, we evaluated two early stages of metaphor comprehension, namely the generation of the figurative meaning and the suppression of the literal meaning. High and low familiar metaphors, and their scrambled counterparts, were aurally presented to participants, who were asked to judge whether sentences were literally true or literally false. Afterwards, they were provided ten minutes to recall the sentences they heard to verify the depth of processing for each type of stimulus. A total of 26 participants with dyslexia were included in the experimental group, and 31 in the control group. ResultsIndividuals with dyslexia showed a MIE and an accuracy rate that are similar to participants without dyslexia. Inhibition correlated with the MIE size only for high familiar metaphors, and working memory seemed to play no role in the process. In the recall task, both groups demonstrated a better encoding of the metaphorical sentences compared to scrambled metaphors, but participants with dyslexia recalled less metaphors than did the control group, showing that metaphors are no exception to the limitations in sentence retrieval typically found in dyslexia. ConclusionsOur findings suggest that individuals with dyslexia are comparable to participants without dyslexia in their ability to automatically compute metaphorical meanings. Thus, difficulties in metaphor comprehension in people with dyslexia that have been detected in previous studies might depend on meaning construction in context rather than online semantic processing.

Alterations in neural activation in the ventral frontoparietal network during complex magnocellular stimuli in developmental dyslexia associated with READ1 deletion

BackgroundAn intronic deletion within intron 2 of the DCDC2 gene encompassing the entire READ1 (hereafter, READ1d) has been associated in both children with developmental dyslexia (DD) and typical readers (TRs), with interindividual variation in reading performance and motion perception as well as with structural and functional brain alterations. Visual motion perception -- specifically processed by the magnocellular (M) stream -- has been reported to be a solid and reliable endophenotype of DD. Hence, we predicted that READ1d should affect neural activations in brain regions sensitive to M stream demands as reading proficiency changes.MethodsWe investigated neural activations during two M-eliciting fMRI visual tasks (full-field sinusoidal gratings controlled for spatial and temporal frequencies and luminance contrast, and sensitivity to motion coherence at 6%, 15% and 40% dot coherence levels) in four subject groups: children with DD with/without READ1d, and TRs with/without READ1d.ResultsAt the Bonferroni-corrected level of significance, reading skills showed a significant effect in the right polar frontal cortex during the full-field sinusoidal gratings-M task. Regardless of the presence/absence of the READ1d, subjects with poor reading proficiency showed hyperactivation in this region of interest (ROI) compared to subjects with better reading scores. Moreover, a significant interaction was found between READ1d and reading performance in the left frontal opercular area 4 during the 15% coherent motion sensitivity task. Among subjects with poor reading performance, neural activation in this ROI during this specific task was higher for subjects without READ1d than for READ1d carriers. The difference vanished as reading skills increased.ConclusionsOur findings showed a READ1d-moderated genetic vulnerability to alterations in neural activation in the ventral attentive and salient networks during the processing of relevant stimuli in subjects with poor reading proficiency.

Interaction between Risk Single-Nucleotide Polymorphisms of Developmental Dyslexia and Parental Education on Reading Ability: Evidence for Differential Susceptibility Theory.

While genetic and environmental factors have been shown as predictors of children's reading ability, the interaction effects of identified genetic risk susceptibility and the specified environment for reading ability have rarely been investigated. The current study assessed potential gene-environment (G×E) interactions on reading ability in 1477 school-aged children. The gene-environment interactions on character recognition were investigated by an exploratory analysis between the risk single-nucleotide polymorphisms (SNPs), which were discovered by previous genome-wide association studies of developmental dyslexia (DD), and parental education (PE). The re-parameterized regression analysis suggested that this G×E interaction conformed to the strong differential susceptibility model. The results showed that rs281238 exhibits a significant interaction with PE on character recognition. Children with the "T" genotype profited from high PE, whereas they performed worse in low PE environments, but "CC" genotype children were not malleable in different PE environments. This study provided initial evidence for how the significant SNPs in developmental dyslexia GWA studies affect children's reading performance by interacting with the environmental factor of parental education.

Alouette-R normative data for French-speaking school-aged children living in Quebec.

The Alouette-R (2005) by Lefavrais is one of the most widely used tools to assess reading skills in French. However, this instrument does not have normative data specific to the French-speaking population of Quebec, Canada. The validity of an assessment being strongly compromised when using inappropriate norms, the first objective of this study was to establish local norms for the Alouette-R. The second objective was to provide sensitivity and specificity data for each Alouette-R measure in the French-speaking Quebec population. The third objective was to compare Quebec and French normative data and their sensitivity to better understand the applicability and effectiveness of the Alouette-R test at the regional level. A total of 347 fluent readers and 48 children with dyslexia from 3rd to 6th grades were recruited from different regions in Quebec. Participants had to read aloud the 265-word text of the Alouette-R in a maximum of 3 min. Norms (means, standard deviations and percentiles) by school grades were created for each test measure: reading time, number of words read, number of errors, number of words correctly read, reading accuracy index and reading fluency index. The sensitivity (i.e., the ability to correctly identify children with dyslexia) and specificity (i.e., the ability to correctly identify children without dyslexia) of these measurements were also documented. The norms and their sensitivity were then compared with those of the original French study by Lefavrais in 2005. The presence of differences between European and Quebec norms supports the importance of using local norms when assessing language skills. The reading accuracy and fluency indexes are the measurements that best discriminated children with dyslexia from those without a reading disorder in our study. This study will allow clinicians working in Quebec to have a better interpretation of the Alouette-R measurements and ultimately avoid erroneous conclusions resulting from the use of foreign normative data. What is already known on this subject The Alouette-R is a reading test validated and standardized in France to screen for dyslexia in children. The validity of existing norms with the Quebec population in Canada is questionable due to socio-linguistic differences with the population of France. What this study adds to existing knowledge This study provides for the first time normative and sensitivity/specificity data of the Alouette-R for French-speaking school-aged children living in Quebec. Differences were noted with the normative data from France, which supports the importance of using local normative data when administering reading tests in Quebec. What are the potential or actual clinical implications of this work? When administering the Alouette-R, clinicians in Quebec will now be able to use normative data adapted to the local population, which will limit erroneous conclusions resulting from the use of foreign normative data. In addition, the sensitivity and specificity values reported in the article will allow these clinicians to better interpret their results when screening for a developmental reading disorder.

Tangible Interaction Design in Music Intervention for Chinese Children with Developmental Dyslexia

With the development of children’s education, parents and teachers pay more and more attention to the learning and training of children with developmental dyslexia (DD). There are many reasons for DD and various intervention tools with a large number of learning costs. In this paper, we aim to analyze the relationship between music, pinyin, and reading, and confirm the theoretical link of "music - Chinese pinyin - reading ability". Then, we sort out a method to design the music intervention tool in this article, which is a new tangible interactive tool for children with DD. This tool is composed of hardware and software and has three modules: music intervention, pinyin intervention, and reading intervention, covering a total of 11 levels and is suitable for classroom teaching, home self-study, and other scenarios, to improve the Chinese pinyin and reading abilities. Subsequently, we conducted a pre-experiment and formal experiment on 20 children with DD to demonstrate the effectiveness of this tool, while using the SUS scale to analyze the evaluation of these children. Finally, we figured that the intervention tool designed in this study has a certain helpful effect on improving the phonetic and reading abilities of children with DD, and is more effective than the three intervention methods used alone. This study has certain reference significance for the designers of intervention tools and also provides new intervention methods for teachers in training institutions. It also provides another possibility for the self-treatment and training of children with developmental dyslexia.

Sex Differences in White Matter Diffusivity in Children with Developmental Dyslexia.

Despite the high prevalence of developmental dyslexia in the U.S. population, research remains limited and possibly biased due to the overrepresentation of males in most dyslexic samples. Studying biological sex differences in the context of developmental dyslexia can help provide a more complete understanding of the neurological markers that underly this disorder. The current study aimed to explore sex differences in white matter diffusivity in typical and dyslexic samples in third and fourth graders. Participants were asked to complete behavioral/cognitive assessments at baseline followed by MRI scanning and diffusion-weighted imaging sequences. A series of ANOVAs were conducted for comparing group membership (developmental dyslexia or typically developing), gender status (F/M), and white matter diffusivity in the tracts of interest. The Results indicated significant differences in fractional anisotropy in the left hemisphere components of the inferior and superior (parietal and temporal) longitudinal fasciculi. While males with dyslexia had lower fractional anisotropy in these tracts compared to control males, no such differences were found in females. The results of the current study may suggest that females may use a more bilateral/alternative reading network.

Shared and task-specific brain functional differences across multiple tasks in children with developmental dyslexia

Different tasks have been used in examining the neural functional differences associated with developmental dyslexia (DD), and consequently, different findings have been reported. However, very few studies have systematically compared multiple tasks in understanding what specific task differences each brain region is associated with. In this study, we employed an auditory rhyming task, a visual rhyming task, and a visual spelling task, in order to investigate shared and task-specific neural differences in Chinese children with DD. First, we found that children with DD had reduced activation in the opercular part of the left inferior frontal gyrus (IFG) only in the two rhyming tasks, suggesting impaired phonological analysis. Children with DD showed functional differences in the right lingual gyrus/inferior occipital gyrus only in the two visual tasks, suggesting deficiency in their visuo-orthographic processing. Moreover, children with DD showed reduced activation in the left dorsal inferior frontal gyrus and increased activation in the right precentral gyrus across all of the three tasks, suggesting neural signatures of DD in Chinese. In summary, our study successfully separated brain regions associated with differences in orthographic processing, phonological processing, and general lexical processing in DD. It advances our understanding about the neural mechanisms of DD.

Understanding mental health in developmental dyslexia through a neurodiversity lens: The mediating effect of school-connectedness on anxiety, depression and conduct problems.

Dyslexia, a neurocognitive difference characterised by poor word-reading, is associated with elevated risk for internalising (e.g., anxiety) and externalising (e.g., aggression) mental health concerns, the reasons are largely unknown. We took a neurodiversity perspective and explored whether school-connectedness mediated these associations. A total of 283 primary school children (87 with dyslexia) and their caregivers (95.4% mothers) completed a battery of well-validated connectedness and mental health measures. Two mediation models (one for child-report and one for caregiver-report) tested direct and indirect effects of dyslexia on anxiety, depression and conduct problems via several domains of school-connectedness. After controlling for gender and neurodevelopmental conditions other than dyslexia, there were no direct effects of dyslexia on child- or caregiver-reported internalising symptoms or child-reported conduct problems. Dyslexia was associated with child and caregiver reported anxiety, depression and conduct problems via low levels of school (but not teacher, friend or peer) connectedness. Findings highlight school-connectedness as an important intervention target for the mental health of children with dyslexia. Future research is needed to test associations between dyslexia, school-connectedness and mental health over time.

Unraveling the complex interplay between statistical learning and working memory in Chinese children with and without dyslexia across different ages.

The relation between statistical learning and working memory in children with developmental dyslexia (DD) remains unclear. This study employed a distributional and a conditional statistical learning experiment and a working memory task to examine this relation in 651 Chinese 6- to 12-year-olds with and without DD (NDD = 199, 101 females; NwoDD = 452, 227 females; participated 2014-2019). Results showed working memory positively associated with recognizing high-predictable and familiar items in both groups, but negatively associated with recognizing unfamiliar items in the DD group only. These findings uncovered the complex interplay between statistical learning and working memory, demonstrating how different working memory abilities in children with and without DD relate to various statistical learning mechanisms at the item level.

Effects of a visual perception-based occupational therapy program on reading and motor skills in children with developmental dyslexia: Single blind randomized cross-over study design.

This study aimed to examine the effects of a visual praxis-based occupational therapy (VPOT) program on reading and motor skills for children with developmental dyslexia (DD). Forty-two children were included in the study. Additionally, before VPOT, the Reading-Aloud and Reading-Comprehension Test 2 (ORSRC-2) and the Bruininks-Oseretsky Motor-Proficiency-Test-2-Brief Form (BOT2-BF) were applied to the participants. According to the study design, VPOT was applied to two sessions per week for 8 weeks to group A. During this period, group B was accepted as the control group. At the end of these 8 weeks, evaluation tests were applied to both groups. Then, group A was defined as the control group and Group B as the intervention group, and VPOT was applied to Group B. At the end of another 8 weeks, evaluation tests were applied to both groups for the third time. When the final ORSRC-2 results were examined, VPOT was found to be an effective program for improving reading skills. Additionally, when the final BOT2-BF results were examined, VPOT was determined to be effective in improving motor skills (p < 0.05). We believe that it is important to carry out comprehensive studies such as the VPOT program to solve problems in the physical and learning activities of children with DD.

Exploring brain plasticity in developmental dyslexia through implicit sequence learning.

Developmental dyslexia (DD) is defined as difficulties in learning to read even with normal intelligence and adequate educational guidance. Deficits in implicit sequence learning (ISL) abilities have been reported in children with DD. We investigated brain plasticity in a group of 17 children with DD, compared with 18 typically developing (TD) children, after two sessions of training on a serial reaction time (SRT) task with a 24-h interval. Our outcome measures for the task were: a sequence-specific implicit learning measure (ISL), entailing implicit recognition and learning of sequential associations; and a general visuomotor skill learning measure (GSL). Gray matter volume (GMV) increased, and white matter volume (WMV) decreased from day 1 to day 2 in cerebellar areas regardless of group. A moderating effect of group was found on the correlation between WMV underlying the left precentral gyrus at day 2 and the change in ISL performance, suggesting the use of different underlying learning mechanisms in DD and TD children during the ISL task. Moreover, DD had larger WMV in the posterior thalamic radiation compared with TD, supporting previous reports of atypical development of this structure in DD. Further studies with larger sample sizes are warranted to validate these results.

Do children with developmental dyslexia have syntactic awareness problems once phonological processing and memory are controlled?

IntroductionSyntactic awareness is the ability to monitor and manipulate word order within sentences. It is unclear whether children with dyslexia have syntactic awareness problems, as there are mixed results in the literature. Dyslexia is typically classified with very poor word and nonword reading and phonological processing problems are often observed in this population. It is conceivable that a phonological deficit could strain memory when performing oral syntactic awareness tasks. Here we examine if syntactic awareness problems are observed in children with dyslexia once phonological processing and memory skills are controlled.MethodsReal and nonword reading efficiency tests determined reading level. Children with dyslexia (n = 25) were compared to typically developing children (n = 24) matched for age (M = 8;8) and nonverbal abilities. Syntactic awareness was measured with an oral word order correction task (e.g., Is baking Lisa and her son in his room sleeps). Tests of phonological awareness, phonological memory, and verbal working memory were also administered and served as controls.ResultsThe dyslexic group performed worse than typically developing readers on syntactic awareness and this group difference persisted once phonological memory and verbal working memory were controlled. However, after controlling for phonological awareness skills, there were no group differences on the syntactic awareness test.Discussion:The results suggest that phonological awareness problems in particular might be responsible for syntactic awareness difficulties in dyslexia and future studies should control for this. The results are discussed within theoretical frameworks on the nature of oral language deficits in dyslexia.