Heterogeneity of short-term memory deficits in children with dyslexia.

Many studies have highlighted short-term memory (STM) impairment in dyslexic individuals. Several studies showed deficits for both item and serial order aspects of verbal STM in dyslexic individuals. These group-based studies, however, do not inform us about the prevalence of these deficits and, importantly, their potential heterogeneity at the individual level. The present study examined both group-level and individual STM profiles in dyslexic and age-matched non-dyslexic children. While confirming previous group-based results of both item and serial order STM deficits, individual analyses indicated two distinct profiles: one profile was associated with verbal item STM and phonological impairment while another profile showed selective serial STM deficits in both verbal and visual domains. Our results highlight the need for practitioners to consider the heterogeneous nature of STM impairment in dyslexia and to adapt STM and reading treatment strategies accordingly.

Factors Explaining Deficits in Reading Acquisition: The Case of Williams Syndrome.

Purpose Multiple factors impact reading acquisition in individuals with reading disability, including genetic disorders such as Williams syndrome (WS). Despite a relative strength in oral language, individuals with WS usually have an intellectual disability and tend to display deficits in areas associated with reading. There is substantial variability in their reading skills. While some authors have postulated that phonological deficits are at the source of their reading deficits, others have suggested that they can be attributed to visuospatial deficits. This study was the first to undertake an in-depth exploration of reading skills among French-speaking children and adults with WS. We tested the assumption that some factors influence performance on single-word identification among individuals with WS, with a focus on the roles of phonological awareness and visuospatial skills. Method Participants were 29 French-speaking adults with WS and 192 controls matched for nonverbal mental age and reading level. We administered tests assessing reading (decoding and word recognition), vocabulary (expressive and receptive), and phonological and visuospatial skills. We also controlled for chronological age and nonverbal reasoning. Results Phonemic awareness was the most predictive factor of single-word identification in the WS group. Visuospatial skills also contributed, but not more or beyond other factors. More broadly, reasoning skills may also have accounted for the variability in single-word identification in WS, but this was not the case for either chronological age or vocabulary. Conclusions There is considerable heterogeneity among adults with WS, who may be either readers or prereaders. Similar profiles identified among individuals with other specific learning disabilities suggest that high reading variability is not specific to the neuropsychological profile of WS. We discuss a multidimensional approach to the factors involved in reading deficits in WS.

Acquisition of Reading and Intellectual Development Disorder.

We propose a review of the literature of the studies investigating reading acquisition in intellectual deficiency (ID), with particular focus on the explanatory factors for reading difficulties. Indeed, we explore the role of intellectual efficiency, perceptual abilities, oral language development, phonological processing and memory. The study of reading acquisition in ID is a challenge because of a high degree of heterogeneity in the results which, together with other variables influencing learning and development. This review has allowed us to understand that there are multiple reasons why individuals with ID have difficulty learning to read. More specifically, there is a link between reading skills and certain cognitive skills, such as perception, oral language, phonological processing and working memory.

Second-language learners' advantage in metalinguistic awareness: a question of languages' characteristics.

BACKGROUND: The awareness of the formal structure of language has been widely studied in the literature but less in a bilingualism context. Even less with second-language learners (SLL) who are acquiring their second language (L2) and are not considered as bilinguals. AIMS: This study aimed at providing an investigation of young SLL's skills in phonological, morphological and syntactic awareness. SAMPLES: Ninety-five French first graders participated in our study. Children were divided into two groups: monolinguals versus SLL of German (i.e., L1 = French, L2 = German). METHOD: Both groups completed two phonological tasks (i.e., phonological categorization and deletion). They also completed four morphological tasks evaluating their morphological awareness on two distinct aspects (i.e., affixes and compounds). Finally, they were evaluated on a syntactic awareness task. RESULTS: The main findings highlighted a bilingual superiority for compounds morphological and syntactic awareness but not for affixes morphological and phonological awareness. CONCLUSIONS: The second-language learning advantage was observed on dimensions distinguishing the two languages (i.e., compounds morphology and syntax) but not on shared affixes morphological and phonological dimensions. Thus, results are discussed in light of languages' characteristics and bilingualism proficiency.

[Detection and identification of cursive handwriting movement characteristics among young children]. / Détection et identification d'une caractéristique du mouvement d'écriture manuscrite chez des l'enfant.

This research focuses on the ability of the young child to detect and identify the continuity or discontinuity of a cursive handwriting movement. The evolution of this ability has been studied by comparing the performance of nonscripters (kindergarten) pupils and students scripters (2nd and 5th years of primary school). Results showed that the perception of information relating to the continuity of writing movement is antecedent to the formal learning of cursive handwriting. Analysis of the justifications produced by the youngest participants suggests that early knowledge of handwriting movement is not explicitable.