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- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!paladin.american.edu!auvm!NIU.BITNET!TJ0WAH1
- Message-ID: <CSG-L%92122310412813@VMD.CSO.UIUC.EDU>
- Newsgroups: bit.listserv.csg-l
- Date: Wed, 23 Dec 1992 10:37:00 CST
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: TJ0WAH1@NIU.BITNET
- Subject: Bill, Gary, Tom
- Lines: 52
-
- [From Wayne Hershberger]
-
- Bill, I am delighted with your argument (Powers, 921220)--relating
- perceptual and conceptual EVs. Some of your remarks I found
- particularly refreshing; for instance:
-
- All we see is the combination of the natural law and the law
- represented by the form of the perceptual function.
- And,
- The...problem is to find organizations of the input
- functions that will yield controllable variables
-
-
- As for your comment:
- Some added thoughts about this were in my head when I woke
- up (921221).
- I can not help observing that it must have been a long night.
-
- More later, Bill.
-
- Gary Cziko:
-
- The VOR is not perfect; nor is the optokinetic reflex. I think
- the gain (eye-velocity/head-velocity) of these two reflexes
- combined is only about .9, meaning that during active head
- rotation of 50 deg/s, images slip across the retina at 5 deg/s.
-
- David Robinson claims that the VOR involves the control of eye
- position as well as eye velocity. He also claims that the
- saccadic system CONTROLS EYE POSITION VIA CLOSED LOOP CONTROL, and
- argues that this phylogenetically late system commandeered aspects
- of the earlier VOR system in its development.
-
- I believe Tom Bourbon's recent post regarding the control of error
- is really an essay concerning feedforward. Feedforward can be
- thought of as endogenous disturbances to reference signals, error
- signals, or output (as I argued in my ABS article in the special
- issue edited by Rick). You might want to reread Tom's posts with
- that in mind.
-
- Tom Bourbon:
- Your post regarding the disturbance of error signals is germane to
- the discussion Andy and I were having in Durango about Pavlovian
- conditioning. Has he read your post?
-
- Warm regards, Wayne
-
- Wayne A. Hershberger Work: (815) 753-7097
- Professor of Psychology
- Department of Psychology Home: (815) 758-3747
- Northern Illinois University
- DeKalb IL 60115 Bitnet: tj0wah1@niu
-