Fitting GRSM ( a.k.a RS-GRM)
GRSM(Graded Rating Scale Model) or also-unknown-as RS-GRM(Rating Scale-Graded Response Model) can be fitted by only a couple of softwares. I implemented the fitting in R package mirt(Chalmers, 2012). You can set itemtype="grsmIRT" for it. The only tricky thing that remains is that mirt automatically adjust the response categories so that the difference between the response categories to be 1. He..
차기작 : R을 배우자
2016. 4. 18. 00:47