Greg Wallace

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Greg Wallace

Associate Professor



Email: Greg Wallace
Office Phone: (202) 994-8285
2115 G Street NW Washington DC 20052

Greg Wallace, PhD, is an Associate Professor at The George Washington University. His research focuses on neuropsychological and structural brain development in autism spectrum disorder and other neurodevelopmental disorders across the lifespan and their impacts on real-world outcomes. For example, he has recently examined executive functioning profiles and their relationships to academic achievement in children and adaptive functioning in both children and young adults with autism spectrum disorder. He is also particularly interested in eating-related behaviors and their cognitive and neural correlates in typical and atypical (e.g., autism spectrum disorder) development. Dr. Wallace has published extensively and presented his work widely on these and related topics.

  • Associate Editor, Journal of Abnormal Child Psychology
  • Editorial Board Member, Journal of Autism and Developmental Disorders
  • Editorial Board Member, Scientific Reports
  • Editorial Board Member, American Journal on Intellectual and Developmental Disabilities
  • Editorial Board Member, Research in Autism Spectrum Disorders
  • Member, International Society for Autism Researchers (INSAR)
  • Member, Society for Neuroscience (SFN)
  • Autism Spectrum Disorders
  • Neurodevelopmental Disorders
  • Neuropsychology
  • Brain Development

Dr. Wallace conducts several lines of work examining both brain (primarily using magnetic resonance imaging [MRI]) and behavioral development in autism spectrum disorders in collaboration with the Center for Autism Spectrum Disorders at Children's National Medical Center and with the Laboratory of Brain and Cognition at the NIMH.

We are investigating:

  • Atypical structural brain development in adolescents and adults with autism spectrum disorders;
  • Neuropsychological functioning in children, adolescents and adults with autism spectrum disorders, including both strengths (e.g. savant skills) and difficulties (e.g. executive function)
  • Adult outcome in autism spectrum disorders
  • Selective ('picky') eating and overeating and their behavioral, cognitive, and neural correlates in typical and atypical (e.g., autism spectrum disorder) development

SPHR 2133: Autism (Undergraduate level)

SPHR 2101: Research Methods (Undergraduate level)

SPHR 6210: Research in Communication Sciences and Disorders (Graduate level)

SPHR 6291: Autism (Graduate level)

Wallace, G. L., Peng, C. S., & Williams, D. (in press). Interfering with inner speech selectively disrupts problem-solving and is linked with real-world executive functioning.  Journal of Speech, Language, and Hearing Research.  

Kraper, C. K., Kenworthy, L., Popal, H., Martin, A., & Wallace, G. L. (2017). The gap between adaptive behavior and intelligence in autism persists into young adulthood and is linked to psychiatric co-morbidities.  Journal of Autism and Developmental Disorders, 47, 3007-3017. 

Wallace, G. L., Dudley, K., Anthony, L., Pugliese, C. E., Orionzi, B., Clasen, L., Lee, N. R., Giedd, J. N., Martin, A., Raznahan, A., & Kenworthy, L. (2017). Divergence of age-related differences in social-communication: Improvements for typically developing youth but declines for youth with autism spectrum disorder.  Journal of Autism and Developmental Disorders, 47, 472-479. 

Wallace, G. L., Budgett, J., & Charlton, R. (2016). Aging and autism spectrum disorder: Evidence from the broad autism phenotype.  Autism Research, 9, 1294-1303. doi: 10.1002/aur.1620.

Wallace, G. L., Yerys, B. E., Peng, C. S., Dlugi, E., Anthony, L., & Kenworthy, L. (2016). Assessment and treatment of executive function impairments in autism spectrum disorder: An update.  International Review of Research in Developmental Disabilities, 51, 85-122.
Wallace, G. L., Kenworthy, L., Pugliese, C. E., Popal, H. S., White, E. I., Brodsky, E., & Martin, A. (2016). Real-world executive functions in adults with autism spectrum disorder: Profiles of impairment and associations with adaptive functioning and co-morbid anxiety and depression.  Journal of Autism and Developmental Disorders, 46, 1071-1083.

Kuschner, E. S., Eisenberg, I. W., Orionzi, B., Simmons, W. K., Kenworthy, L., Martin, A., & Wallace, G. L. (2015). A preliminary study of self-reported food selectivity in adolescents and young adults with autism spectrum disorder. Research in Autism Spectrum Disorders, 15-16, 53-59.

Wallace, G. L., Eisenberg, I. W., Robustelli, B., Dankner, N., Kenworthy, L., Giedd, J. N., & Martin, A. (2015). Longitudinal cortical development during adolescence and young adulthood in autism spectrum disorders: Increased cortical thinning but comparable surface area changes. Journal of the American Academy of Child and Adolescent Psychiatry, 54, 464-469.

Wallace, G. L., White, S., Robustelli, B., Sinclair, S., Hwang, S., Martin, A., & Blair, R. J. (2014). Cortical and subcortical abnormalities in youths with conduct disorder and elevated callous-unemotional traits. Journal of the American Academy of Child and Adolescent Psychiatry, 53, 456-465.

Anthony, L.G., Kenworthy, L., Yerys, B.E., Jankowski, K.F., James, J.D., Harms, M.B., Martin, A., & Wallace, G.L. (2013). Interests in high-functioning autism and more intense, interfering, and idiosyncratic than those in neurotypical development.  Development and Psychopathology, 25, 643-652.

Wallace, G.L., Robustelli, B., Dankner, N., Kenworthy, L., Giedd, J.N. & Martin, A. (2013). Increased gyrification but comparable surface area in adolescents with high functioning autism spectrum disorders. Brain, 136, 1956-1967.

Wallace, G.L., Shaw, P., Lee, N.R., Clasen, L.S., Raznahan, A., Lenroot, R.K., Martin, A., & Giedd, J.N. (2012). Distinct cortical correlates of autistic versus antisocial traits in a longitudinal sample of typically developing youth. Journal of Neuroscience, 32, 4856-4860.

Wallace, G.L., Case, L.K., Harms, M.B., Silvers, J.A., Kenworthy, L., & Martin, A. (2011). Diminished sensitivity to sad facial expressions in high functioning autism spectrum disorders is associated with symptomatology and adaptive functioning. Journal of Autism and Developmental Disorders, 41, 1475-1486.

Wallace, G.L., Dankner, N., Kenworthy, L., Giedd, J.N., & Martin, A. (2010). Age-related temporal and parietal cortical thinning in autism spectrum disorders. Brain, 133, 3745-3754.

Wallace, G.L., Silvers, J.A., Martin, A., & Kenworthy, L.E. (2009). Further evidence for inner speech deficits in autism spectrum disorders. Journal of Autism and Developmental Disorders, 39, 1735-1739.

Wallace, G.L., Happe, F., & Giedd, J.M. (2009). A case study of a multiply-talented savant with an autism spectrum disorder: Neuropsychological functioning and brain morphometry. Philosophical Transactions of the Royal Society B: Biological Sciences, 364, 1425-1432.

Ph.D., Psychology, Univeristy of London, 2006