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Re: st: confirmatory factor analysis with binary variables


From   Steven Samuels <sjhsamuels@earthlink.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: confirmatory factor analysis with binary variables
Date   Fri, 12 Dec 2008 16:47:47 -0500


On Dec 12, 2008, at 3:55 PM, Buckley, Gillian J. wrote:
I am trying to do a confirmatory factor analysis on data that is all binary, 0=no, 1=yes. I have downloaded the tertrachoric command and used this to find the tertrachoric correlations. Is it possible to do confirmatory factor analysis with this data using the cfa1 command in Stata 9?


The Statalist FAQ state: "Say what command(s) you are using. If they are not part of official Stata, say where they come from: the STB/SJ, SSC, or other archives."

-cfa1- (and its more able sibling -cfa-) were written by Stas Kolenikov. The -help- files (available online if you type "search cfa1, all") show no provision for inputting correlation matrices.

-gllamm- ("search gllamm, all") will fit CFAs, but people more experienced than I report that this is not easy. Also, -gllamm- will not report standard CFA fit statistics.

Look into Mike Neale's free MX Program, which is available for a variety of platforms. I learned about it from Jay Verkuilen's post at http://www.stata.com/statalist/archive/2008-11/msg00776.html

-Steve
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