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.