control of objects. "The data suggests that in order to have a sense of being with another

person, it is vital that the system 'works' in the sense that people have an impression of

being able to actually do what they wish to do" [4].

 Dancing Beyond Boundaries~~~~dddd~~~~ddd involves the use of video conferencing over a high-

speed network as a method of distributed performance. This piece used Access Grid

technology and an Internet2 connection to allow dancers and musicians from four

different locations across North and South America to interact with each other. "Thus the

combination of multi-modal information from the four nodes created a 'virtual studio'

that could also be termed a distributed virtual environment, though perhaps not in the

usual sense" [5].

 An important aspect of distributed performance is the state of co-presence that is

achieved. Co-presence is the sense of being in the same space with other people.

Distributed collaboration has shown to be successful since it achieves a high degree of

co-presence. It has been shown that the level of immersion is related to a user' s sense of

presence and co-presence. The level of immersion also relates to leadership roles in

group settings [6].

 2.2 Virtual Reality

 Frederick Brooks Sr. defines a virtual reality experience as "any in which the user

is effectively immersed in a responsive virtual world. This implies user dynamic control

of viewpoint." Effective immersion has been achieved through the use of novel display

and interaction systems [7].

 Immersive displays create a sense of presence through multi-sensory stimulation.

Previous examples of these systems include head-mounted displays, CAVE (Cave-like