Evaluating experience-focused HCI

There is growing interest in experience-focused, rather than task-focused, HCI. Task-focused HCI has developed methods for creating and validating knowledge, but those methods may not be applicable or sufficient for experience-focused technology. In particular, new evaluation techniques to validate knowledge need to be created, discussed, and understood. I address this in three ways. First, it is important to understand the historical, technical and social factors that impact the evaluation criteria the community consider valid today. Second, I propose an ethnomethodological approach to evaluation that emphasizes the ways users use and make sense of technologies. And third, I demonstrate the validity of my approaches by means of several case studies.