Genetic and Environmental Influences on Achievement Outcomes Based on Family History of Learning Disabilities Status

Assessing Beliefs About Intrinsic and Extrinsic Determinants of SLD: Evaluating the Factor Structure of a Novel Instrument

Schools conduct comprehensive psychoeducational evaluations to identify students with specific learning disabilities (SLDs) and determine whether they qualify for special education services. This decision-making process is complex and research has documented many factors influencing SLD identification decisions. One such factor may be decision-makers' beliefs about the underlying causes of SLD, including intrinsic and extrinsic factors. However, no studies to date have examined the underlying factor structure of the responses to prompts about the causes of SLD from intrinsic and extrinsic perspectives. This study was conducted with a sample of 521 school psychologists as part of a larger study examining decision-making during SLD identification. Using confirmatory factor analyses (CFA) to compare two theoretically plausible models, results suggested that a single latent factor best captured variability in responses to these prompts. Implications for assessing beliefs and how they impact the psychoeducational assessment process to identify SLDs are discussed, along with areas for future research.

Orthographic Depth May Influence the Degree of Severity of Maze Learning Performance in Children at Risk for Reading Disorder

Reading disability (RD), which affects between 5 and 17% of the population worldwide, is the most prevalent form of learning disability, and is associated with underactivation of a universal reading network in children. However, recent research suggests there are differences in learning rates on cognitive predictors of reading performance, as well as differences in activation patterns within the reading neural network, based on orthographic depth (i.e., transparent/shallow vs. deep/opaque orthographies) in children with RD. Recently, we showed that native English-speaking children with RD exhibit impaired performance on a maze learning task that taps into the same neural networks that are activated during reading. In addition, we demonstrated that genetic risk for RD strengthens the relationship between reading impairment and maze learning performance. However, it is unclear whether the results from these studies can be broadly applied to children from other language orthographies. In this study, we examined whether low reading skill was associated with poor maze learning performance in native English-speaking and native German-speaking children, and the influence of genetic risk for RD on cognition and behavior. In addition, we investigated the link between genetic risk and performance on this task in an orthographically diverse sample of children attending an English-speaking international school in Germany. The results from our data suggest that children with low reading skill, or with a genetic risk for reading impairment, exhibit impaired performance on the maze learning task, regardless of orthographic depth. However, these data also suggest that orthographic depth influences the degree of impairment on this task. The maze learning task requires the involvement of various cognitive processes and neural networks that underlie reading, but is not influenced by potential differences in reading experience due to lack of text or oral reporting. As a fully automated tool, it does not require specialized training to administer, and current results suggest it may be a practicable screening tool for early identification of reading impairment across orthographies.

Tracking Familial History of Reading and Math Difficulties in Children's Academic Outcomes

The current study aimed to investigate the extent to which familial history of reading and math difficulties have an impact on children's academic outcomes within a 3-year longitudinal study, which evaluated their core reading and math skills after first (N = 198; 53% girls) and second grades (N = 166), as well as performance on complex academic tasks after second and third grades (N = 148). At baseline, parents were asked to complete the Adult Reading History Questionnaire (ARHQ) and its adaption, Adult Math History Questionnaire (AMHQ), to index familial history of reading and math difficulties, respectively. Preliminary findings established the psychometric properties of the AMHQ, suggesting that it is a reliable and valid scale. Correlation analyses indicated that the ARHQ was negatively associated with children's reading skills, whereas the AMHQ was negatively related to math outcomes. Path results revealed that the ARHQ predicted children's performance on complex reading tasks indirectly via their core reading skills, and the AMHQ was linked to complex math outcomes indirectly via core math abilities. The ARHQ was also found to be negatively correlated with measures of children's math performance, with path findings suggesting that these relations were indirectly explained by differences in their core reading skills. These results suggest that assessing familial risk for academic difficulties may be crucial to understanding comorbid etiological and developmental associations between reading and math differences.

Insights into Dyslexia Genetics Research from the Last Two Decades

Dyslexia, a specific reading disability, is a common (up to 10% of children) and highly heritable (~70%) neurodevelopmental disorder. Behavioral and molecular genetic approaches are aimed towards dissecting its significant genetic component. In the proposed review, we will summarize advances in twin and molecular genetic research from the past 20 years. First, we will briefly outline the clinical and educational presentation and epidemiology of dyslexia. Next, we will summarize results from twin studies, followed by molecular genetic research (e.g., genome-wide association studies (GWASs)). In particular, we will highlight converging key insights from genetic research. (1) Dyslexia is a highly polygenic neurodevelopmental disorder with a complex genetic architecture. (2) Dyslexia categories share a large proportion of genetics with continuously distributed measures of reading skills, with shared genetic risks also seen across development. (3) Dyslexia genetic risks are shared with those implicated in many other neurodevelopmental disorders (e.g., developmental language disorder and dyscalculia). Finally, we will discuss the implications and future directions. As the diversity of genetic studies continues to increase through international collaborate efforts, we will highlight the challenges in advances of genetics discoveries in this field.

Vocabulary performance of students with and without difficulties learning to read and write

ABSTRACT Purpose: to compare vocabulary performances and verify the lexical competence of students with and without difficulties learning to read and write. Methods: 93 first-grade students were divided into Group I (50 students without difficulties) and Group II (43 students with difficulties learning to read and write). They were administered the Child Language Test focusing on vocabulary. The analysis considered aspects of usual word designation, non-designation, and substitution process. The data analysis was conducted with the Mann-Whitney test, with a p-value ≤ 0.05. Results: there were significant performances in the comparison between the groups in all the conceptual fields analyzed. There was no significance for either group regarding the conceptual fields of Foods, Furniture and Appliances, Places, and Professions in non-designation; regarding Means of Transportation in substitution processes; regarding Toys and Musical Instruments in both non-designation and substitution processes. Group I had higher means than Group II in usual word designation, and lower ones in non-designation and substitution processes. Conclusion: students with difficulties learning to read and write had greater difficulties in usual word designation, as well as higher error indexes in substitution processes and non-designation, which reveals a deficient vocabulary concerning lexical access in comparison with students without difficulties.

Academic achievement and the effects of the student’s learning context: a study on PISA data

Abstract School achievement is under a multiple factorial context related to student, school and family (SSF). Based on 23.141 Brazilians self-reports, obtained from PISA 2015, representative SSF measures were selected, and their impacts measured on school performance scores in mathematics, reading and science. The feeling of belonging to the school (BELONG) and parents’ emotional support (EMOSUPS) were strongly correlated with the three investigated performances. EMOSUPS affected how the student feels at school and when being assessed. And the educational and cultural resources of the home affected EEC three dimensions, increasing EMOSUPS, BELONG and school performance, and decreasing anxiety during assessments. Thus, the importance of the school and family environments on students’ performance is reiterated and calls for public policies in education that considers the three dimensions.

Developmental dynamics between reading and math in elementary school

Reading and math attainment develop during elementary grades. Questions remain, though, about the co-developmental nature of the relation between reading and math. This study examined dynamic, longitudinal pathways between reading and math in first through fourth grades. Participants of the study were 554 academically at-risk children (Mage at the first assessment point = 6.57 years; SD = 0.38) from Texas Project Achieve. Children were assessed utilizing the Woodcock-Johnson-III reading and math measures. Results from dynamic bivariate latent change score models indicated unidirectional longitudinal coupling effects from reading to math. Specifically, average and high levels of reading performance were associated with subsequent gains in math growth, in particular for below average performing children in math. In contrast, low levels of reading performance had negligible or no amplifying influences on change in math growth. The nature of the dynamics was replicated even when controlling for nonverbal cognitive abilities. Results demonstrated that good reading skills pave the way for children to develop their math skills. Such findings underscore the importance of considering reading performance in treating math difficulties.

Multifactorial pathways facilitate resilience among kindergarteners at risk for dyslexia: A longitudinal behavioral and neuroimaging study

Recent efforts have focused on screening methods to identify children at risk for dyslexia as early as preschool/kindergarten. Unfortunately, while low sensitivity leads to under-identification of at-risk children, low specificity can lead to over-identification, resulting in inaccurate allocation of limited educational resources. The present study focused on children identified as at-risk in kindergarten who do not subsequently develop poor reading skills to specify factors associated with better reading outcomes among at-risk children. Early screening was conducted in kindergarten and a subset of children was tracked longitudinally until second grade. Potential protective factors were evaluated at cognitive-linguistic, environmental, and neural levels. Relative to at-risk kindergarteners with subsequent poor reading, those with typical reading outcomes were characterized by significantly higher socioeconomic status (SES), speech production accuracy, and structural organization of the posterior right-hemispheric superior longitudinal fasciculus (SLF). A positive association between structural organization of the right SLF and subsequent decoding skills was found to be specific to at-risk children and not observed among typical controls. Among at-risk children, several kindergarten-age factors were found to significantly contribute to the prediction of subsequent decoding skills: white matter organization in the posterior right SLF, age, gender, SES, and phonological awareness. These findings suggest that putative compensatory mechanisms are already present by the start of kindergarten. The right SLF, in conjunction with the cognitive-linguistic and socioeconomic factors identified, may play an important role in facilitating reading development among at-risk children. This study has important implications for approaches to early screening, and assessment strategies for at-risk children.

Correlation between receptive vocabulary skill, syntactic awareness, and word writing

ABSTRACT Purpose: to verify the correlation between receptive vocabulary, syntactic awareness, and single-word orthographic writing tests. Methods: a total of 42 third graders from elementary public schools, of both genders, aged 8 to 9 years, participated in this study. To obtain the data, the vocabulary test through images, syntactic awareness test, word dictation test, and writing under dictation test were used. For normality distribution, the Kolmogorov-Smirnov test was used; in the relationship between the variables, the Spearman correlation test and the R2 value test were used (p-value ≤ 0.05). Results: there was a statistically significant difference, with a moderate positive correlation between receptive vocabulary, syntactic awareness, and word dictation (values near 0.40 to 0.50); moderate-to-high, between grammatical judgment, word dictation, and writing under dictation (values near 0.50 to 0.75); low-to-moderate, between word dictation and grammatical correction, grammatical and ungrammatical correction, and word categorization (values near 0.25 to 0.50); and moderate-to-high, between word dictation and writing under dictation (values near 0.50 to 0.75). Conclusion: a positive correlation was identified, ranging from low to high, pointing to the direct and favorable relationship between receptive vocabulary skills, syntactic awareness, and single-word writing.