PROJECT SUMMARY/ABSTRACT - Cambridge Health Alliance ALACRITY for Early Screening and Treatment of High Risk Youth (eSToRY) Methods Core for Study and Data Collection Design, Support and Dissemination The Methods Core will be the linchpin of the eSToRY Center, bringing together a powerful mix of clinical and sociocontextual data, the latest rapid computer adaptive testing of psychopathology and symptomatology, a suite of rigorous in-depth community-engaged qualitative techniques and quantitative methods applied to large administrative and clinical trial data, and an emphasis on community-based participatory research to increase the relevance and appropriateness to racial/ethnic and language (REL)-minority youth and families. The backbone of the Methods Core is a team of renowned methodological experts and a large clinical-sociocontextual dataset, linking >600,000 REL-diverse patients' electronic health records (EHR), insurance claims, criminal justice, neighborhood- and individual-level social determinants of health (SDOH) data, and computer adaptive psychiatric testing. These merged data comprise an extensive data warehouse that will facilitate novel solutions to intractable mental health problems. In Aim 1, we will establish a HIPAA-compliant integrated clinical-sociocontextual data warehouse for use in early identification, prevention, and treatment of mental illness among REL-diverse youth. In Aim 2, we will provide methodological support to three R34 projects and pilot projects, employing the latest rigorous quantitative and qualitative methods to increase the relevance and understanding of mechanisms of racial/ethnic and language disparities in access and quality of mental health care. In Aim 3, we will engage and solicit participation of individuals from diverse backgrounds, including community stakeholders, to assure the relevance of the research projects, interpret results, develop interventions, and disseminate findings through a strong web of clinical-, school-, and community-based connections.