The Interaction Lab focuses on developing computational principles, techniques, models, and interventions to enable socially assistive human-robot interaction that supports human health and wellness. Socially Assistive Robotics (SAR) uses non-contact social interaction interventions involving social, emotional, cognitive, and physical abilities of users, toward improved wellness, communication, learning, and autonomy. The Interaction Lab conducts research in an interdisciplinary SAR arena that uses computing, engineering, and human user studies to characterize, model, and understand complex human behavior. Our projects aim to contribute insights and individualized tools toward mitigating pervasive societal challenges—including skill training for autism, anxiety, and depression coping, rehabilitation, and healthy aging —that require sustained personalized support that supplement the efforts of caregivers, clinicians, parents, and educators.