It is important to address the substantial substance-related health disparities of American Indians (AI). This project aims to examine the effectiveness of a culturally tailored Community Reinforcement and Family Training (CRAFT) approach and Twelve-step facilitation with Concerned Signficant Others (TSF-CSOs) among AIs to increase engagement of treatment refusing individuals into treatment/healing and to reduce distress of their loved ones. Study hypotheses are that (1) CRAFT will result in higher numbers of people entering treatment for substance use disorders than will TSF-CSO, (2) both groups will yield similar improvements in the family member's functioning, and (3) we will explore potential factors of the treatments to see which aspects of the treatment are most important and to test which characteristics of the clients impact the outcomes for better or worse. This knowledge may impact dissemination and diffusion efforts for CRAFT-AI and other evidence-based treatments among AIs and other culturally diverse groups.