From: John Wann Subject: Re: DESIGN: Cognitive Tracking Joe Psotka (Psotka@alexandria-emh2.army.mil) wrote: >Since there was no tracker attached to the system, I did what >came naturally. I stood up and began swinging my head and PID >in synchrony with my button pushes.....What really amazed me >was how natural this felt ....and the sense of immersion was >terrifically compelling. I don't see this as surprising, you are merely creating vestibular and proprioceptive (+efferent) sensations that are more in accord with the visual motion. It just confirms that if visual and non-visual motion cues have approximate concordance then the experience appears more "natural". I still can't come to terms with your use of the label "cognitive tracking" - Surely this is just "tracking", or "Visual tracking". "Cognitive tracking" seems to imply that you "imagine your head turning". Unfortunately, I don't see the observation has great implications for VR applications - the whole idea of having trackers, even for a game, was to make the display head-motion responsive so the user could direct their gaze (not have it directed for them). Having an display where you are passively transported through the virtual space is surely on the borders of what is and is not VR/VE (see for instance the useful1992 NSF workshop definition of VE/VR). John Wann Edinburgh VR/Perception Lab. Ps: You wrote "personally I find the repetitive shooting and blood offensive." - Not sure you should tell your employers this Joe! {joke not flame ]