Hey, Dorothee. SEM does not use the S-B chi squared index. If you want to use it, however, I have some methods written for the Satorra-Bentler Chi Square test in the sem.additions package over at r-forge.
To install it directly within R type install.packages("sem.additions",repos="http://R-Forge.R-project.org") For more details, see http://r-forge.r-project.org/projects/sem-additions/ Dorothee wrote: > > Hello, > > > It has been found that SEM analysis using polychoric correlations + > maximum likelihood estimator produces incorrect test statistics and > standard errors (e.g., Flora, D. B., & Curran, P. J. (2004). An Empirical > Evaluation of Alternative Methods of Estimation for Confirmatory Factor > Analysis With Ordinal Data. Psychological Methods, 9(4), 466-491). > > Standard errors can be dealt with by using bootstrap estimations. But, I > was wondering how the fit indexes in the SEM package were estimated when > the observed variables are categorical (ordinal or/and binary) and when > one is using polychoric correlation (hetcor in polycor package) in > combination with ML. Does SEM use the Satorra-Bentler rescaled Chi-square > for instance? > I look in previous posts but couldn't find what i am looking for (hope i > looked well enough!). > > > Cheers, > Dorothee > > -- View this message in context: http://www.nabble.com/Fit-indexes-in-SEM-with-categorical-data-%2B-ML-estimation-tp21782611p22314468.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@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.