ASD is estimated to occur in 1.6% of children (CDC, 2014), and approximately 30% of the ASD population remains minimally verbal (MV). This MV portion of the population experiences considerable clinical impairment and requires intensive intervention that often fails to achieve improved outcomes. Relatively little research focuses on understanding why these children fail to gain language. As a psychologist and translational researcher, my work focuses on identifying the mechanisms underlying language impairment in ASD, in order to better predict developmental trajectories and individualize intervention. The proposed study will use EEG to (1) measure multiple facets of language processing in order to assess causes of language impairment in MV children with ASD; (2) analyze spectral components of the EEG signal in order to reveal possible biological mechanisms influencing language development in ASD; and (3) use advanced biostatistics methods specifically developed for analyzing rich, multifaceted datasets such as what is yielded by EEG recording. This level of rigorous inference will be instrumental in discovering neurobiological traits that underlie heterogeneity in ASD. Very few electrophysiology studies have included MV participants, likely due to the difficulties inherent in working with that population. Findings from this study will form the foundation for my application for an NIH R01 award, focused on discovering how these EEG biomarkers of language impairment in children with ASD are related to developmental trajectories and progress in intervention. My long-term academic career will target this underserved population, improving outcomes by understanding neural mechanisms underlying language impairment and contributing to the development of mechanism-based, individualized intervention strategies.
We propose to measure neural correlates of language processing in minimally verbal children with autism spectrum disorder (ASD), and investigate whether these measures are different between minimally verbal and verbal children with ASD, as well as typically developing children. We will couple behavioral assessment measures with electrophysiology, in order to capture subtle differences in neural mechanisms which can reveal pathways to language impairment in children with ASD, thus informing intervention efforts.
