Trajectories and the Extended User Experience
2An emerging generation of artists is creating new forms of interactive experience that combine real and virtual worlds, and digital content with live action. I will draw on examples of these 'mixed reality performances' to illustrate the idea of the extended user experience that spans multiple real and virtual spaces, timescales, roles and interfaces. I will show how such experiences can be described in terms of interleaved trajectories. While initially grounded in examples from performance art, I will argue that this concept of trajectories can help us design all manner of cultural experiences from visiting museums, to playing games, to enjoying a day in a theme park, and may even provide a basis for designing all kinds of mobile and interactive services.