i need help on the syntax. some says that it can be done with ltm packages. but i don't know how to make the syntax
On Tuesday, December 19, 2017 at 11:02:00 AM UTC+7, Ampeh Sarok wrote: > > I have a first dataset, 100 items with 1000 respondens. I already done the > IRT test with 2pl for these 100 items. I had discriminant and difficulty > for each item. > > If I have a second dataset, let's say 95 items with 1000 respondens I want > to find item discriminant and item difficulty for 95 items of second > dataset using 5 items as anchor from first dataset. > > how to do that with packages mirt or ltm? or any other packages can do > that? can you help me with the syntax? >
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