  We present Ball-AR, an augmented reality (AR) game where two players in the
same physical space attempt to hit each other with virtual dodgeballs overlaid
on the physical world. Researchers have studied AR's potential for fostering
co-located interaction and physical activity; however, they have not
investigated the impacts of physical activity and physical environment on user
experiences and interaction. We created an AR dodgeball game centered around
encouraging physical activity and harnessing the physical environment. We then
evaluated the game with five dyads to analyze the impacts of these design
choices on the quality of gameplay and interaction between players. We found
that physical activity and the shared physical space created memorable
experiences and interactions among participants, although participants desired
a more augmented and immersive experience.
