Motivational science says that to engage people in behavior change, we must respect and support their autonomy—their ability to make what experts may think is the wrong choice. Let's explore boundaries and limitations of this science. When do business goals take precedence over user goals? When does expertise warrant deviating from what the user wants? When does possibly achieving a greater good justify a design that “nudges” a user’s course of action? Two behavior change design experts will tackle this question from the perspectives of clinical psychology, motivational psychology, and behavior change design. You will learn about pros and cons of volitional support versus expert guidance.