Also, various IRT packages might likely work, as IRT is really just SEM with catagorial outcomes. See: http://cran.r-project.org/src/contrib/Views/Psychometrics.html
Alex On 8/19/07, John Fox <[EMAIL PROTECTED]> wrote: > > Dear Upasna, > > I apologize for responding so late, but I was out of town when you posted > your query to r-help. > > The sem() function in the sem package can handle dichotomous and ordered > categorical observed variables via tetrachoric, polychoric, biserial, and > polyserial correlations computed by the polycor package. See in particular > the hetcor() function in that package, which can compute "heterogeneous" > correlation matrices. Standard errors for parameter estimates in the SEM > can > then be computed by bootstrapping; see ?boot.sem in the sem package for an > example with a confirmatory factor-analysis model for ordinal observed > variables. > > I hope that this helps, > John > > ------- original message ------- > > Hi > > I am looking for a structural equation modeling package in R which can be > used for categorical data. Is anyone aware of the existence of such a > package? Would appreciate any help on this. > > Thank you > Upasna > > -- > --------------------------------------------------------------------- > Upasna Sharma > Research Scholar > Shailesh J. Mehta School of Management, > Indian Institute of Technology, Bombay > Powai, Mumbai - 400076, India > > -------------------------------- > John Fox, Professor > Department of Sociology > McMaster University > Hamilton, Ontario > Canada L8S 4M4 > 905-525-9140x23604 > http://socserv.mcmaster.ca/jfox > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > -- *************** A. Alexander Beaujean, Ph.D., LSSP Licensed Psychologist (Provisional, TX) http://myprofile.cos.com/abeaujean http://www.baylor.edu/soe/faculty/index.php?id=38476 "General impressions are never to be trusted. Unfortunately when they are of long standing they become fixed rules of life, and assume a prescriptive right not to be questioned. Consequently those who are not accustomed to original inquiry entertain a hatred and a horror of statistics. They cannot endure the idea of submitting their sacred impressions to cold-blooded verification. But it is the triumph of scientific men to rise superior to such superstitions, to devise tests by which the value of beliefs may be ascertained, and to feel sufficiently masters of themselves to discard contemptuously whatever may be found untrue." --Sir Francis Galton, FRS [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.
