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Learn comprehensive evaluation methodologies in Human-Computer Interaction and User Experience research through this 89-minute lecture from NPTEL-NOC IITM. Explore the fundamental overview of evaluation approaches in HCI and UX research, distinguishing between qualitative and quantitative evaluation methods. Master think-aloud protocol techniques and remote usability testing procedures to gather user insights effectively. Understand cognitive load analysis principles and user behavior tracking methods to assess mental effort and interaction patterns. Discover how to evaluate accessibility compliance using WCAG guidelines to ensure inclusive design. Gain expertise in web analytics and interaction logging techniques for extracting meaningful UX insights from user data. Learn to measure critical metrics including error rates and user frustration indicators to quantify user experience quality. Apply experimental evaluation frameworks to conduct rigorous research studies and validate design decisions in HCI contexts.