This document provides an overview of motivational interviewing (MI), including its definition, spirit, assumptions, tasks, goals, principles, and skills. MI is a collaborative communication method used to strengthen a person's intrinsic motivation for change. It assumes motivation is fluid and influenced by relationships and context. The main task is to guide conversations in a way that elicits motivation for change, with the goal of influencing health behaviors. Key principles include expressing empathy, amplifying ambivalence, avoiding arguments, supporting self-efficacy, and rolling with resistance. Skills involved are open-ended questions, affirmations, reflections, and summaries. The document also discusses ambivalence, change talk, commitment language, and behaviors related to health