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RE: st: factor analysis on tetrachoric correlation


From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   RE: st: factor analysis on tetrachoric correlation
Date   Mon, 26 Jan 2004 02:17:02 -0000

Thanks to Richard Williams and Jean-Benoit Hardouin for
their explanations. 

Nick 
[email protected] 

Richard Williams

> >I'm in ignorance here.
> >
> >Are tetrachoric and polychoric just different
> >names for the same kind of correlations?
> 
> tetrachoric is a special case of polychoric.  From "Lisrel 8: 
> Structural 
> equation modeling with the Simplis Command Language" by Karl 
> Koreskog and 
> Dag Sorbom, pp. 44-45:

...

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