Re: [R] sem package and AMOS

2009-02-03 Thread Anthony Dick
Hi John- Thanks. You were right--AMOS was not reading the sample size correctly (i.e., I was not telling it correctly). When I corrected the problem, I got the same estimates. Thanks for pointing me in the right direction. Anthony John Fox wrote: Dear Anthony, sem() does FIML estimation, n

Re: [R] sem package and AMOS

2009-02-02 Thread John Fox
Dear Anthony, sem() does FIML estimation, not 2SLS, and so it's hard to understand why you're getting "nearly identical" parameter estimates but very different coefficient standard errors and model chi-squares. In fact, unless the problem is very ill-conditioned, the parameter estimates should be

[R] sem package and AMOS

2009-02-02 Thread Anthony Dick
Hello- I am using R to build my initial models, but need to use AMOS to compare the models of two groups (adults vs. kids). The problem is I am getting different results with R and AMOS for the initial models of the separate groups (and the R results make more sense). The parameter estimates