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<DIV><FONT face=Arial size=2>The Castelloe paper from Iowa gave a very nice
explanation --</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>From the earlier (1976) paper, it appears that Lane
first uses the 20x20 confusion matrix to create a half-matrix of similarity
scores which serve as input to a cluster analysis. The cluster
analysis is the basis for building both a tree model and a 2D
visualization based on "cluster distance". The tree model is used to
build a (binary) distinctive feature model of the handshapes. Then, as one
of the techniques to measure the general ordering of the features, Lane builds a
2x2 confusion matrix for each feature (stimulus/response X
present/absent) at each noise level. The T measures shown in Figure 8
(Figure 7.8 in the later paper) are derived from groups of the 2x2
matrices using the IT measure outlined in the Castelloe paper.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It's marvelous work. It would
be interesting to have access to the original confusion matrices, to see if
any of today's clustering techniques would yield a different feature
model.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Rosalee</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=dparvaz@MAC.COM href="mailto:dparvaz@MAC.COM">Dan Parvaz</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=SLLING-L@ADMIN.HUMBERC.ON.CA
href="mailto:SLLING-L@ADMIN.HUMBERC.ON.CA">SLLING-L@ADMIN.HUMBERC.ON.CA</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, January 26, 2004 7:27
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Lane's T</DIV>
<DIV><BR></DIV>
<BLOCKQUOTE>Any insights into how it's done?<BR></BLOCKQUOTE><BR>I only have
access to the reprint of Lane's article as found in _The Signs of Language_,
which seems to skip some -- okay, all -- of the math. From my reading of the
text, it isn't a 2x2, but a 20x20 confusion matrix for all the hand
configurations being checked. At any rate, the Miller formulae (which is what
Lane used) can be found in the first couple of pages in this paper:<BR><BR><?fontfamily><?param Arial><?color><?param 0000,8080,0000><?x-tad-bigger>www.stat.uiowa.edu/~gwoodwor/JackBootIT.pd<BR><BR><?/x-tad-bigger><?/color><?/fontfamily>It's
all that good Information Theory stuff that most CS programs (including mine!)
love to torture their students with :-) If you want to talk about it, feel
free to email me.<BR><BR>Cheers,<BR><BR>Dan.<BR></BLOCKQUOTE></BODY></HTML>