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- Date: Wed, 6 Jan 1993 11:21:52 -0700
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- From: "William T. Powers" <POWERS_W%FLC@VAXF.COLORADO.EDU>
- Subject: Drifting reference levels
- Lines: 55
-
- [From Bill Powers (930106.1115)]
-
- Avery Andrews (930106.1856) --
-
- > a) conventional psychologists aren't interested explaining
- > macro-phenomena
-
- > b) their quantitative standards for micro-phenomena are too
- > low to prevent them from getting buried in trash.
-
- >I have a suspicion that this is true of the institutional
- >structure of psychology, though I suspect that (a) is false for
- >many individual psychologists, and even more for people on the
- >margins of psychology, such as AI-ers, broad minded linguists,
- >etc.
-
- The only psychologists I know of of whom these statements aren't
- true are those who have discovered that there are behavioral
- experiments, however simple, that will generate reproducible and
- accurate results for each indivual. Once having had such an
- experience, such psychologists are no longer able to go back to
- the way experimental psychology has been done in the past.
-
- ---------------------------------
- RE: picking up finger, moving it, putting it back on spot with
- eyes closed.
-
- >My conjecture is that there is some component of the assortment
- >of control systems involved here that is being pushed to its
- >limits of resolution, kinesthetic memory being one obvious
- >possibility, but there are others.
-
- That's a start. I would want to get some instrumentation on this
- before settling for a statistical summary of the results. For
- example, is there any systematic drift in the kinesthetic
- reference level that can be related to the movements in the time
- before the finger comes down again? If I apply random (but known)
- disturbances in x and y while the finger is off the paper, can I
- influence the final landing position? Does the reference signal
- drift with time even if the finger doesn't move while it's in the
- air?
-
- It seems to me that you could do this experiment with a mouse,
- and get some real data on it.
-
- ( Moving back a little...)
-
- >so the only useful description of the results is a statistical
- >one.
-
- That would be giving up before you even start.
- ---------------------------------------------------------------
- Best,
-
- Bill
-