Operation Citadel: Exploring the Role of Docents in Mixed Reality

In this paper we describe the role of docents in a mixed reality game at a historic site called Operation: Citadel. The docents act as intermediaries between the system and the participants, providing interpretation and understanding of the game and managing interaction. This permits the integration of sophisticated interactions and rich narrative while maintaining the walk-up-and-use, casual nature of the exhibit. We describe the implementation and design, and examine the effect that docents had on enjoyment of and frustration with the game. Our results indicate that docents can serve an important role in augmenting participant experience. We identify and describe a set of roles unique to docents of Mixed Reality experiences.