Developmental Dyslexia (DD) is a neurodevelopmental disorder thought to reflect circumscribed neurobiological anomalies and etiologies, although the exact brain mechanisms involved have not been clearly identified. Along with environmental factors, these anomalies conspire to make the development of a certain complex sets of skills, particularly those involved in reading, difficult, and in the most severe cases, extremely difficult to treat. This project's overarching goal is to provide the first detaild and integrated neurobiological and cognitive (i.e., neurocomputational) characterization of DD treatment resisters, whose relatively intractable impairments are likely to be primarily brain-based. A related goal is to contrast this neurocomputational characterization of the DD treatment resisters with those of DD treatment responders and typically developing (TD) children. By systematically investigating the cognitive and neuroimaging similarities and differences in these groups, and the neurocomputational deficits that contribute most strongly to differential outcomes, particularly treatment outcomes will be identified. The project addresses important developmental questions by comparing younger (3rd/4th graders) and older (7th/8th graders) DD children, and will similarly study comorbid young (3rd/4th graders) children, using a multidimensional framework, that have DD and significant language and/or attentional impairments. In all groups, the project employs integrated pre- and post-treatment functional and structural neuroimaging, cognitive testing, online linguistic and non-linguistic learning experiments, and computational modeling. With these tools, a key goal is to develop and test neurocomputational theories in order to examine the relationship between cognitive deficits that generate noisy systems, rate limitations, limit capacity and consolidation failure (and therefore function as proximal causes of higher order reading-related problems in DD), and underlying differences in brain organization, and their impact on predicting treatment resistance.

Public Health Relevance

Reading is a critical life-skill for one's quality of life and health. Children who do not learn to read fluently, even with quality educations, and who do not respond well to special validated treatments are thought to have specific neurobiological anomalies. Understanding these specific underlying brain impairments and related neurocognitive disabilities in dyslexic children and their impact on learning to read will provide stronger basis for treatment and prevention for these children.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Program Projects (P01)
Project #
1P01HD070837-01A1
Application #
8550340
Study Section
Special Emphasis Panel (ZHD1-DSR-H (MR))
Program Officer
Miller, Brett
Project Start
2013-08-01
Project End
2018-05-31
Budget Start
2013-08-01
Budget End
2014-05-31
Support Year
1
Fiscal Year
2013
Total Cost
$972,170
Indirect Cost
$160,108
Name
Georgia State University
Department
Psychology
Type
Schools of Arts and Sciences
DUNS #
837322494
City
Atlanta
State
GA
Country
United States
Zip Code
30302