  There are many potential measures that one might use when evaluating
mixed-reality experiences. In this position paper I will argue that there are
various stances to take for evaluation, depending on the framing of the
experience within a larger body of work. I will draw upon various types of work
that my team has been involved with in order to illustrate these different
stances. I will then sketch out some directions for developing more robust
measures that can help the field move forward.
