Maureen Walton is a community psychologist and the Toby Brzoznowski Research Professor in Behavioral Health Technology Innovations in the Department of Psychiatry. She conducts research on prevention and early interventions to reduce substance use, violence, and injury, particularly among adolescents and young adults. She has expertise in harnessing technology for digital delivery of evidenced-based interventions, with or without human support. Recent lines of work focus on optimizing interventions, including using innovative designs [Sequential Multiple Assignment Randomized Controlled Trial; Micro-Randomized Trials) to answer key scientific questions.