R help - Jan 2008 - Factor Analysis

Good Morning,

Is it possible to use the R program for a CFA with dichotomous data?

Thank you,

Kathleen


Kathleen Kemp, M.A.
Doctoral Clinical Psychology Student,
Concentration: Forensic Psychology
Drexel University
Philadelphia, PA 19104
kk354@drexel.edu



	[[alternative HTML version deleted]]

you may check the ltm package:

http://wiki.r-project.org/rwiki/doku.php?id=packages:cran:ltm

I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
      http://www.student.kuleuven.be/~m0390867/dimitris.htm


Quoting Kathleen Kemp <kathleen.kemp at drexel.edu>:
> Good Morning,
>
> Is it possible to use the R program for a CFA with dichotomous data?
>
> Thank you,
>
> Kathleen
>
>
> Kathleen Kemp, M.A.
> Doctoral Clinical Psychology Student,
> Concentration: Forensic Psychology
> Drexel University
> Philadelphia, PA 19104
> kk354 at drexel.edu
>
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>


Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

Dear Kathleen,

You can use the sem() function in the sem package to fit CFA models from
tetrachoric correlations computed with the polycor package. See ?boot.sem in
the sem package for an example using polychoric correlations for ordinal
observed variables (tetrachoric correlations are a special case when the
variables are dichotomous). This example is also described in a paper that
you can get at <http://socserv.mcmaster.ca/jfox/Misc/sem/SEM-paper.pdf>.

I hope this helps,
 John

--------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Kathleen Kemp
> Sent: January-12-08 9:11 AM
> To: r-help at r-project.org
> Subject: [R] Factor Analysis
> 
> Good Morning,
> 
> Is it possible to use the R program for a CFA with dichotomous data?
> 
> Thank you,
> 
> Kathleen
> 
> 
> Kathleen Kemp, M.A.
> Doctoral Clinical Psychology Student,
> Concentration: Forensic Psychology
> Drexel University
> Philadelphia, PA 19104
> kk354 at drexel.edu
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.