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- Posted-Date: Tue, 5 Jan 93 08:45:10 -0800
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- Date: Tue, 5 Jan 1993 08:45:10 -0800
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: Marken@COURIER4.AERO.ORG
- Subject: CSG 60s Revival, demos
- Lines: 50
-
- [From Rick Marken (920105.0800)]
-
- Gary Cziko, Mary Powers --
-
- Who doesn't know Arlo (and Woody) Guthrie?
- Gary -- it looks like I'll have to bring my guitar
- along to the next CSG meeting (I actually will
- because I'm driving). Then you can pluck out
- Alice's Restaurant for Dag (and me -- I love it);
- and I can do my "Bob Dylan for CSG" repetoire,
- which includes the song "Too much a' nothin'"
- with the immortal line:
-
- " when there's too much a nothin'
- no one's in control"
-
- Avery Andrews (930105.10.00)--
-
- >Switching topics, another problem with Gary's demo is that it doesn't
- >defuse the `standard brushoff' of PCT -- `we've known about this
- >feedback stuff for more than thirty years, and that it doesn't really
- >do very much for you'. I don't believe that any collection of `mere' demos
- >of the phenomenon of control can overcome this objection, & I'm not too
- >optimistic about the prospects for heaps of quantitative data either,
- >no matter how precise.
-
- I completely agree. Greg's "devil's advocacy" shows that if people don't
- want to believe in control, they don't have to. I think people throughout
- the behavioral sciences have a serious committment to the input-output
- view of behavior (and it is a "view" -- just as much as feedback control is
- a view). No amount of evidence can "demolish" someone's world view;
- people who wanted to view the earth as a fixed sphere at the center of the
- universe had no trouble dealing with evidence suggesting that it was not;
- moreover, some of the most compelling evidence was in favor of the stationary
- earth view -- just as some of the most compelling evidence is in favor of the
- input-output view. If the world is moving, why aren't the tree always
- bent back by the wind created by this spin? On a nice calm day it's
- really ridiculous to imagine that you are standing on a hugh globe that
- is spining at high speed; yeah, sure it is. But most of us now accept this
- (because of all the other evidence). In a tracking task the subject MUST be
- responding to movements of the cursor -- how else would s/he know what
- to do. But PCT says that the cursor is NOT the cause of responses; the
- cursor is a controlled variable that is both a cause and result of responses;
- yeah, sure. But people will eventually accept this too -- though, as Avery
- says, not on the basis of any particular demonstration of the problems of
- believing otherwise.
-
- Best regards
-
- Rick
-