Variability in behavior is the spice of life, but also difficult to study. This is especially true for stuttering, a neurodevelopmental communication disorder for which variability is a hallmark characteristic — people stutter sometimes and in certain situations, but not other times in other situations. The dynamics that give rise to stuttering emerge at multiple levels, from neural through behavioral and environmental. In the Stuttering and Vvariability (SaVvy) Lab, we use a multi-leveled and multidisciplinary approach to study the variability of stuttering and the factors that drive it, including social interaction and anticipation. Our goal is to use basic science and human experience to inform support mechanisms and intervention approaches to improve the lives of children and adults who stutter.