The primary focus of human-computer interaction (HCI) research is to understand and improve the interaction between people and computer systems. HCI examines how users engage with technology, emphasizing usability, accessibility, and user experience design. By studying cognitive, social, and physical aspects of interaction, HCI helps inform the design of interfaces that are intuitive and effective. The ultimate goal is to create technology that enhances user satisfaction and productivity while ensuring that systems accommodate a diverse range of users.