Which method is primarily concerned with the user's perspective during a product's use?

User experience design is fundamentally focused on the user's perspective throughout all stages of interaction with a product. It encompasses understanding user needs, behaviors, and emotions throughout their journey, ensuring that the product is not only usable but also meaningful and valuable from the user’s standpoint. This discipline considers various elements, such as usability, accessibility, and pleasure, as users interact with a product, making it unique in its comprehensive approach to enhancing the overall experience.

Interaction design, while closely related, primarily focuses on the design of the interaction between users and products, such as how users engage with interfaces and systems. It is a crucial component of user experience design but does not cover the broader scope of user emotions and satisfaction.

Interface design focuses specifically on the layout and design of the interface elements that facilitate interactions, rather than on the overall user experience. Similarly, visual design is concerned primarily with aesthetics and visual appeal, which, while important, does not adequately capture the user's experiential journey or perspective.

Thus, user experience design stands out as the method that centers on the user’s perspective during product use, addressing their needs and feelings in a holistic manner.