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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!gatech!paladin.american.edu!auvm!UIUC.EDU!G-CZIKO
- Message-ID: <199208162225.AA19472@ux1.cso.uiuc.edu>
- Newsgroups: bit.listserv.csg-l
- Date: Sun, 16 Aug 1992 17:25:56 -0500
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: "Gary A. Cziko" <g-cziko@UIUC.EDU>
- Subject: Generating Output
- X-To: Control Systems Group Network CSGnet <csg-l@vmd.cso.uiuc.edu>
- Lines: 42
-
- [from Gary Cziko 920816.1715]
-
- Rick Marken (920814.2200) said:
-
- >There are many incarnations of cognitivism. But what is common to all
- >of them (and what is commonly wrong) is that they view behavior as the
- >end result of mental processing.
-
- and
-
- >There are many other examples of cognitive "models" . . . but they
- >all have one thing in common -- once all the processing
- >has occurred, behavior just "pops out" as the end result. Sorry,
- >but behavior CANNOT happen that way. So, no matter how clever the
- >processing carried out by these "models", they cannot behave; so they
- >cannot be correct.
-
- This reminds me of a conversation I had with Greg Williams at the last CSG
- meeting in Durango. Greg was telling me that the arm demo does generate
- output. It may not calculate trajectories, but it nonetheless generates a
- behavior based on the error signal of the difference between its reference
- level and its perception. And the digital nature of computers requires
- that these calculations be done in discrete steps (in the sequence
- perception, comparison, action).
-
- When I show Demo2 to someone with computer savvy, he or she can say that
- what the model does is a reiteration of
- perception-behavior-perception-behavior, etc. a la TOTE. I realize that if
- we were all using analog computers this TOTE interpretation could not be
- made, but by using digital computers don't the demos show in fact that
- control can be accomplished by generating output based on input (sounds
- pretty S-R to me)? I would very much like to have Marken and Powers
- comment on this with critical reflection by Williams. --Gary
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- Gary A. Cziko Telephone: (217) 333-4382
- Educational Psychology FAX: (217) 244-0538
- University of Illinois E-mail: g-cziko@uiuc.edu
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