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gussing
2008 Feb 28
0
problem with the ltm package - 3PL model
...eters in the
second
simulation,the difficult parameters are not fixed. Why?.
I will like to know if you know the problem.
Thank you for your response,
Xavier G. Ordo?ez
An example the process:
> para.est.I <- tpm(Apli.sample.I,IRT.param = TRUE)
> par.est.I <- coef(para.est.I)
Gussng Dffclt Dscrmn
V32 0.009 -2.453 0.747
V33 0.310 0.444 0.694
V34 0.327 0.873 1.036
V35 0.031 -3.067 0.343
V36 0.054 -0.934 1.130
V37 0.001 -1.991 0.582
V38 0.004 -1.686 0.571
V39 0.003 -2.470 0.910
V40 0.207 0.421 1.307
V41 0.114 -0.843 1.024
> fix.c <-
> cbind(rep(1...