Repetitive and restrictive behaviors are one of the core components of diagnosing a child with an autism spectrum disorder. These behaviors may take the form of repetitive motor movements or vocalizations, often referred to as stereotypical behaviors. These behaviors can impede the child's educational and social opportunities, and have thus become a target for intervention. A variety of interventions have been used to reduce stereotypical behaviors with varied success. One of the most oft-used interventions is deep pressure therapy (e.g., weighted vests), a practice that enjoys substantial anecdotal but little empirical support. Conversely, interventions based on functional behavior assessment (FBA) have been shown to reduce these behaviors, but may not be used frequently within schools. Therefore, this chapter will provide a brief overview of stereotypical behaviors and compare these two intervention approaches, with a clear preference for FBA-based interventions due to their stronger empirical support.