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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!BEN.DCIEM.DND.CA!MMT
- Message-ID: <9210092156.AA05375@chroma.dciem.dnd.ca>
- Newsgroups: bit.listserv.csg-l
- Date: Fri, 9 Oct 1992 17:56:20 EDT
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: mmt@BEN.DCIEM.DND.CA
- Subject: Re: Why 99%?
- Lines: 32
-
- [Martin Taylor 921009 17:50] (trying a quick backlog clearing operation)
- (Tom Bourbon 921002 -- 10:50)
-
- >>Martin Taylor 920929 16:00
- >
- >>My presumption is that you get the 99% prediction because the subsystems
- >>(perhaps ECSs) that are involved in the task are those that support
- >>very many different kinds of behavior, and so are not readily disturbed
- >>by contextual differences.
- >
- >What do you mean by "contextual differences?" I believe your presumption
- >is wrong, but I am not certain what you are saying. By "contextual
- >differences" do you mean that target positions follow different random
- >paths on every trial and the cursor is disturbed by a different random
- >function on every trial?
-
- No, not at all. I mean that a pianist uses the same muscle tension control
- systems to create a legato run as to pick up a piece of bread or to wave to
- a friend. But the higher-level system that generates (eventually) the
- reference level changes that direct the muscel tension control systems can
- be affected by the pianist's hearing a flute played in the next apartment.
- That could disrupt the legato run. The lower-level systems, as they support
- many widely different kinds of perceptual control at higher levels, are not
- very susceptible to contextual influences, whereas the higher level ones,
- being more specific, can be more disturbed.
-
- When you model the pianist, you will probably get very good prediction for
- the low-level controls, but when the flute disrupts the legato run, your
- simulation will not model it. You could build in that source of disturbance,
- but the odds are that you wouldn't.
-
- Martin
-