An Exploratory Study on Emotion-Centered Voice User Interface(VUI) Design for Generation Z Single-Person Households : Focusing on Siri

This study explores strategies to optimize the emotional experience of voice user interfaces (VUIs) in AI assistants, focusing on Generation Z single households in their 20s. The research proceeded in four stages: user survey, case analysis, prototype design with usability testing, and emotion recognition technology analysis, applying the Person–Artifact–Task (P-A-T) model to derive emotion-based VUI design strategies. In UI, visual feedback elements were emphasized, while in UX, conversational naturalness, emotional responsiveness, and adaptability to user states were considered. Usability testing revealed that users perceived personalized dialogue and emotional reactions as key satisfaction factors, with visual feedback enhancing immersion and emotional engagement. These findings suggest that AI assistants can evolve beyond functional tools into emotionally connected digital companions, and the study provides methodological foundations for future personalized VUI design.