PROJECT SUMMARY/ABSTRACT (DESCRIPTION) Brief Alcohol Screening and Intervention for College Students (BASICS) is an evidence-based harm-reduction approach developed in the early 1990’s to address problematic alcohol use among college students. Since then, there has been a proliferation of trials supporting its efficacy and effectiveness in diverse college populations and it has become the basis for the majority of current brief motivational interventions with individual-focused strategies shown to reduce high-risk drinking behavior and/or negative drinking-related consequences. Despite this, several challenges and research gaps remain in our understanding of potential barriers faced by college campuses that are currently implementing BASICS. Additionally, it is unclear whether most schools are delivering BASICS with adherence to its main components and principles or whether adaptations to the intervention are routinely applied due to feasibility considerations1. The proposed research aims to use a mixed methods approach to identify factors influencing implementation outlined by the Exploration, Preparation, Implementation, Sustainment (EPIS)2 framework and the implementation outcomes acceptability, appropriateness, and feasibility outlined by the Implementation Outcomes Framework3. Recently, the International Town and Gown Association (ITGA) financed the implementation of BASICS training with 52+ campuses across the United States, which consists of an intensive brief training model as well as providing technical assistance from BASICS experts based out of the University of Washington. Leveraging this large-scale implementation, the proposed F31 study will examine which factors influence successful integration of BASICS within diverse campus environments. This training grant will also allow the applicant to develop a depth and breadth of knowledge of BASICS and related evidence based AOD interventions as well as expand and deepen knowledge of implementation science theory, mixed-methods data collection, evaluation, and analysis methodology. Data collection through surveys and interviews will allow for a comprehensive understanding of contextual factors that impact implementation of BASICS. Additionally, the proposed research will identify descriptive characteristics of BASICS implementers and universities to better understand circumstances under which the intended mode of delivery of the intervention is likely to be adapted or adhered to. Findings will contribute to the existing literature on brief interventions for alcohol use on college campuses, offering insights into the complexities of large-scale implementation efforts. Knowledge generated by this research will inform future efforts to optimize integration of BASICS and similar programs, ultimately promoting better public health outcomes and improved student well- being at universities nationwide.