Reading is a complex, uniquely human invention for communication through print. It is a critical ability for making progress in education. Students with reading difficulties, the most common learning disability, struggle with reading fluency and accuracy. Skilled reading is enabled by the coordination of a network of brain regions interconnected…

Youth with disabilities are overrepresented in the bullying dynamic and experience poor mental health and school engagement outcomes associated with this involvement. However, limited existing research has looked at differences in bullying involvement based on disability category, and how youth with disabilities make decisions about bullying…

Children with a specific learning disability often struggle with written communication compared to their typically-developing peers (Graham & Harris, 2002; Graham et al., 2017; Troia, 2006). The purpose of this study was to investigate the impact of a researcher-created instructional strategy (i.e., "Audience and Structure…

Students with specific learning disabilities (SLD) represent roughly five percent of U.S. public school students aged 3-21. Current federal policy outlines guidelines for identification of SLDs, while ultimately leaving specific procedures to the determination of state and local education agencies. Research into how the method used in…

Nonverbal Learning Disability (NLD) has been the focus of four decades of neuropsychological research. However, it has yet to be included as a diagnostic category in the Diagnostic and Statistical Manual of Mental Disorders (i.e., currently in its fifth edition, DSM-5, American Psychiatric Association, 2013). Many of the characteristics associated…

Working memory (WM) has long been associated with deficiencies in reading. Approximately 35% of students in the United States who receive special education services do so under the category of specific learning disability (SLD). The study's theoretical underpinning was Baddeley's model of WM; previous research revealed a significant literature gap…

Specific learning disabilities are one of the most common and debilitating disorders experienced by children and adolescents, and students with specific learning disabilities may be particularly vulnerable to anxiety. The Revised Children's Manifest Anxiety Scale, Second Edition (RCMAS-2) is a newly revised measure of chronic, manifest anxiety…

Children with learning disabilities represent the largest category of students served within special education systems in schools, and are at increased risk for academic and psychosocial problems in comparison to peers without learning disabilities. While much of clinical practice and research focus has been on academic interventions,…

In 2001 the No Child Left Behind Act (NCLB) mandated that U.S. public schools provide evidence-based practice for individuals with learning disabilities. However, it is unclear whether U.S. public schools have consistently adhered to this mandate. The purpose of this study was to provide preliminary evidence regarding whether U.S. public schools…

Research has suggested many children with learning disabilities (LD) have deficits in working memory (WM) that hinder their academic achievement. Cogmed RM, a computerized intervention, uses adaptive training over 25 sessions and has shown efficacy in improving WM in children with attention deficit hyperactivity disorder (ADHD) and a variety of…

Recent advances in the understanding of the relations between cognitive abilities and academic skills have helped shape a better understanding of which cognitive processes may underlie different types of SLD (Flanagan, Fiorello, & Ortiz, 2010). Similarities and differences in cognitive-achievement relations for children with and without SLDs…

The present investigation explored the stability of scores on the Wechsler Intelligence Scale for Children-IV (WISC-IV) over approximately a three-year period. Previous research has suggested that some children with Learning Disabilities (LD) do not demonstrate long-term stability of intelligence. Legally, school districts are no longer required…

This dissertation has two areas of focus: learning and developmental disorders (LDDs) and polyfluoroalkyl chemicals (PFCs). Epidemiological and exposure assessment methods are applied to each. The first paper used geographic location as a surrogate for exposure and broadly assesses the effect of the environment, both physical and social, on LDD…