User interface research area focuses on studying and improving the ways in which users interact with various computer systems, applications, and devices. This includes designing interfaces that are intuitive, efficient, and user-friendly, as well as understanding how users perceive and interact with different interface elements. Researchers in this area often explore topics such as usability testing, user experience design, human-computer interaction, and interface design principles. The goal of user interface research is to create interfaces that enhance user productivity, satisfaction, and overall experience while using technology.