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- Path: sparky!uunet!spool.mu.edu!uwm.edu!ogicse!news.u.washington.edu!stein.u.washington.edu!hlab
- From: dstampe@psych.toronto.edu (Dave Stampe)
- Newsgroups: sci.virtual-worlds
- Subject: Re: TECH: Neural Interfacing
- Message-ID: <1992Dec14.014522.6624@u.washington.edu>
- Date: 13 Dec 92 04:33:20 GMT
- Article-I.D.: u.1992Dec14.014522.6624
- References: <1992Dec12.041658.16932@u. <1992Dec13.030227.13564@u.washington.edu>
- Sender: news@u.washington.edu (USENET News System)
- Organization: Department of Psychology, University of Toronto
- Lines: 37
- Approved: cyberoid@milton.u.washington.edu
- Originator: hlab@stein.u.washington.edu
-
-
- chadwell@utkvx3.utk.edu (Chadwell, Leonard) writes:
-
- >Sorry, Dave, but L. Pinneo at SRI DID use EEG systems to do cortical wave
- >pattern matching to qive qualified thought pattern detection. Running on a PDP
- >in 1974, and a skull cap with electrodes (no shaving or such required), the
- >cursor on screen could be issued 7 commmands by thought: UP,DOWN,LEFT,RIGHT,
- >SLOW,FAST,STOP. The main limitations on the system were the RAM (around 32K)
- >and the speed of the processor. The commands were merely thought, and the
- >system could accurately recognize the commands on 60% of the people who were
- >tested on the system, and with modification to pattern matching code, could
- >also match those people. With the progress made in raw computing power and
- >memory capacity, more commands could be recognized with greater accuracy.
-
- I already know about this one. But it's far less reliable than the
- blink type detection, and seems to have been confounded with other things.
- Truth is , EEG is a LOT more complex than most people think-- in fact,
- stuff like eye movements, facial muscle signals, and so on are hard to
- eliminate in a case like this. You could probably get the same thing
- with simple electrodes around the eyes in this case.
-
- It's simply not true that specific thoughts are associated with easily-
- discriminated EEG patterns. Certain _modes_ of processing, or reactions
- to external events, are possible to detect because you're seeing waves
- of processing travel through the cortex.
-
- Potentially, you could train yourself by biofeedback to associate certain
- commands with whatever gave an EEG signal detectable by the computer.
- But I don't think that's what we're looking for.
-
-
- --------------------------------------------------------------------------
- | My life is Hardware, | Dave Stampe |
- | my destiny is Software, | dstampe@psych.toronto.edu |
- | my CPU is Wetware... | dstampe@sunee.uwaterloo.ca |
- | Am I a techno-psychologist, or just an engineer dabbling in psychology?|
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