Lessons to be learned: how a comprehensive neurobiological framework of atypical reading development can inform educational practice

Dyslexia is a heritable reading disorder with an estimated prevalence of 5–17%. A multiple deficit model has been proposed that illustrates dyslexia as an outcome of multiple risks and protective factors interacting at the genetic, neural, cognitive, and environmental levels. Here we review the evidence on each of these levels and discuss possible underlying mechanisms and their reciprocal interactions along a developmental timeline. Current and potential implications of neuroscientific findings for contemporary challenges in the field of dyslexia, as well as for reading development and education in general, are then discussed

Neurochemistry Predicts Convergence of Written and Spoken Language: A Proton Magnetic Resonance Spectroscopy Study of Cross-Modal Language Integration

Recent studies have provided evidence of associations between neurochemistry and reading (dis)ability (Pugh et al., 2014). Based on a long history of studies indicating that fluent reading entails the automatic convergence of the written and spoken forms of language and our recently proposed Neural Noise Hypothesis (Hancock et al., 2017), we hypothesized that individual differences in cross-modal integration would mediate, at least partially, the relationship between neurochemical concentrations and reading. Cross-modal integration was measured in 231 children using a two-alternative forced choice cross-modal matching task with three language conditions (letters, words, and pseudowords) and two levels of difficulty within each language condition. Neurometabolite concentrations of Choline (Cho), Glutamate (Glu), gamma-Aminobutyric (GABA), and N- acetyl-aspartate (NAA) were then measured in a subset of this sample (n = 70) with Magnetic Resonance Spectroscopy (MRS). A structural equation mediation model revealed that the effect of cross-modal word matching mediated the relationship between increased Glu (which has been proposed to be an index of neural noise) and poorer reading ability. In addition, the effect of cross-modal word matching fully mediated a relationship between increased Cho and poorer reading ability. Multilevel mixed effects models confirmed that lower Cho predicted faster cross-modal matching reaction time, specifically in the hard word condition. These Cho findings are consistent with previous work in both adults and children showing a negative association between Cho and reading ability. We also found two novel neurochemical relationships. Specifically, lower GABA and higher NAA predicted faster cross-modal matching reaction times. We interpret these results within a biochemical framework in which the ability of neurochemistry to predict reading ability may at least partially be explained by cross-modal integration

Educator Motivation for Acquiring Expertise to Support Students with Dyslexia: A Phenomenological Study

The purpose of this phenomenological study is to describe the invested motivation for acquiring expertise to support students with dyslexia for elementary school teachers at a charter school in a northeastern state. Teachers employed at Oakdale-Mission Charter School are uniquely positioned to receive in-service teacher training support regarding teaching those with dyslexia. The lack of Orton Gillingham-certified teachers to provide for those with dyslexia prevents these students from adequately receiving access and equity in a school district in a large metropolitan city in a northeastern state. Therefore, Oakdale-Mission Charter School was explored as a unique and innovative solution for those with dyslexia using an in-service teacher training model. The central question of this study was: What are the lived experiences of elementary charter school teachers with invested motivation for acquiring expertise to support students with dyslexia? The theory that supported this central question and guided this study was Knowles’ adult learning theory and the concept of andragogy, predicated on the notion that teacher investment is a critical component in adopting effective instructional practices. The hermeneutical phenomenological design of this study offered an analysis of the various factors associated with teacher motivation. The data collection process included interviews, a focus group, and a journal prompt. This study included 12 participants who experienced professional development training using the Orton Gillingham methodologies. The research uncovered invested motivation associated with supporting those with dyslexia. Future research should explore further options for developing teacher expertise using other teacher support training models through a qualitative study method