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Summary: All Together Now: Visualizing Local and Remote
Actors of Localized Activity
Scott Lederer, Jeffrey Heer
Group for User Interface Research
UC Berkeley, Berkeley, CA, 94720
{lederer, jheer}@cs.berkeley.edu
ABSTRACT
We present All Together Now (ATN), a tool for visualizing
localized activities involving both local and remote actors.
ATN presents each user with a webpage containing a
common view of a shared virtual space modeled after the
physical locus of the activity. Actors signal socially
meaningful behavior by manipulating the spatial positions
of their representations in this space. Local actors' positions
are acquired automatically using computer vision. Remote
actors indicate their positions with a mouse. Actors are not
expressly identified. ATN exploits people's culturally
established notions of spatial position to help them convey
contextually relevant social cues to each other. Conveying
just enough spatial and identity information helps
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