From gkim@postech.ac.kr Wed May 19 20:45:08 1999
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Date: Thu, 20 May 1999 09:34:52 +0900
From: "G. Jounghyun Kim" <gkim@postech.ac.kr>
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To: Matt Conway <mconway@microsoft.com>
CC: 3d-ui@hitl.washington.edu
Subject: Re: Virtual vs. real manipulation
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Status: RO

Hmm ... I tend to agree with both  ...

If you think about the recent quantitative analysis or experimental type of 3D
interaction studies, task-wise, they have been largely confined to navigation,
selection and manipulation.  The techniques used in these evaluation studies
may be something that actually occurs in real world (like direct grab) or may
not be (like world in minature).  So for these basic tasks, we might be able to
say few words about their effectiveness, regardless of whether the techniques
used are imaginary or not.

On the other hand, there are large body of tasks, whose interaction techniques
are yet to be explored and evaluated.   It is not even clear that, even for
VE's that only require the above basic interactions (navigation, selection, and
manipulation), how the context of a particular VE will affect the effectiveness
and performance (that is, are results from above studies apply to specific (non
generic) VR applications).  Another point is, for magical VR systems, perhaps
it is not relevant to ask whether standard interaction techniques borrowed
from, or modeled after the real life ones work in them.  Take a Playstation
game-pad for instance.  If you like the game, you will learn to live with it
...

So my 2 cents toward Doug's question: "no, not yet" (actually we do not even
know !).

Gerry Kim, POSTECH.
www.postech.ac.kr/~gkim