User Experience Design
User experience design is a subset of the field of experience design that pertains to the creation of the architecture and interaction models that affect user experience of a device or system. As user experience is a subjective feeling, it cannot actually be “designed”. Instead, you can design for a user experience, trying to enable certain kind of experiences[1]. The scope of the field is directed at affecting “all aspects of the user’s interaction with the product: how it is perceived, learned, and used.” -Wikipedia