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Re: st: Problem in factor analysis & Cronbach's alpha


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Problem in factor analysis & Cronbach's alpha
Date   Tue, 11 Aug 2009 20:53:08 +0000 (GMT)

--- On Tue, 11/8/09, Xu, Haiyong wrote:
> I got an error message which I don't understand when I was
> testing the Cronbach's alpha of the factors' scores after
> doing factor analysis to a few variables. 
<snip>
> . factor pcs3 mcs3 sfindex3 eurq2 depress_score1_rev, pcf
<snip>
> . predict factor1 factor2
<snip>
> . alpha factor1 factor2, std item detail
> variable __00000P not found
> r(111);

I agree that this is not an informative error message, and that
that should be fixed. My intuition says that it doesn't make 
sense to compute a Cronbach's alpha on factor scores rather than
the original variables, but I will happily bow to superior 
wisdom, which I am sure exists in abundance in this case. 

One such source of superior wisdom that you have close at hand 
are the good people of ATS: 
http://www.ats.ucla.edu/stat/Schedule/walk_in.htm 
We at the list will happily help you, but you just can't beat 
a face to face discussion.

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://home.fsw.vu.nl/m.buis/
-----------------------------------------



      

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