From bowman@cc.gatech.edu Wed May 26 15:27:35 1999 Received: from burdell.cc.gatech.edu (root@burdell.cc.gatech.edu [130.207.3.207]) by lennon.cc.gatech.edu (8.9.1/8.9.1) with ESMTP id PAA24241 for ; Wed, 26 May 1999 15:27:35 -0400 (EDT) Received: from asbestos.hitl.washington.edu (hitl-new.hitl.washington.edu [128.95.73.60]) by burdell.cc.gatech.edu (8.9.1/8.9.1) with ESMTP id PAA09036; Wed, 26 May 1999 15:27:32 -0400 (EDT) Received: from burdell.cc.gatech.edu (root@burdell.cc.gatech.edu [130.207.3.207]) by asbestos.hitl.washington.edu (8.9.3/8.9.3) with ESMTP id MAA21007 for <3d-ui@hitl.washington.edu>; Wed, 26 May 1999 12:27:09 -0700 (PDT) Received: from lennon.cc.gatech.edu (bowman@lennon.cc.gatech.edu [130.207.9.20]) by burdell.cc.gatech.edu (8.9.1/8.9.1) with ESMTP id PAA08987 for <3d-ui@hitl.washington.edu>; Wed, 26 May 1999 15:27:08 -0400 (EDT) Received: (from bowman@localhost) by lennon.cc.gatech.edu (8.9.1/8.9.1) id PAA24218 for 3d-ui@hitl.washington.edu; Wed, 26 May 1999 15:27:07 -0400 (EDT) From: bowman@cc.gatech.edu (Doug Bowman) Message-Id: <199905261927.PAA24218@lennon.cc.gatech.edu> Subject: Re: Virtual vs. Real Manipulation To: 3d-ui@hitl.washington.edu (3D UI List) Date: Wed, 26 May 1999 15:27:06 -0400 (EDT) In-Reply-To: from "Robert W. Lindeman" at May 26, 99 02:27:09 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Status: RO > 2. Path tracing could similarly be done using a "wire-and-loop" type of > electric system. (I remember reading a paper on a virtual system that did > this...anyone have the reference?) Don't know if this is the paper you're thinking of, but the paper titled "Effects of Network Characteristics on Human Performance in a Collaborative Virtual Environment" by Park & Kenyon at VR '99 this year used a task like this, except that it was done by two distributed users. Robert's lists of tasks bring up an interesting question. The "Operation" task and the wire-and-loop task are both very difficult even in the real world. Will VEs be closer to real-world performance on these difficult motor tasks, or on very simple motor tasks? I think both sides of this could be argued. On the one hand, easy tasks require little accuracy and are very forgiving, thus lessening the effects of tracker jitter, bad depth perception, etc. On the other hand, people generally do the very difficult tasks extremely slowly, which could lessen the effects of lag. Thoughts? --Doug P.S. Robert, my defense is tomorrow - thanks for asking - I'll let you know how it went. -- Doug Bowman, Ph.D. Candidate College of Computing, GVU Center, Georgia Tech Room 388 CRB, (404) 894-5104 bowman@cc.gatech.edu http://www.cc.gatech.edu/~bowman/