Hello, I am trying to run several IRT models but they don't produce output... This model is exploratory IRT with 10 factors. It takes a lot of time to run and runs on 100% CPU (I interrupted the program after about 2 hours). proc irt data = data resfunc = graded nfactor = 10 rotate = obvarimax;
var item1 - item65;
run; This model is confirmatory IRT with 10 factors (each item loads only on one factor). It runs for about 15 minutes and then says "Insufficient memory." Produces output for factors (e.g., eigenvalues) but not for item parameters. proc irt data = data resfunc = graded;
var item1 - item65;
factor
F1 -> item1 - item5,
F2 -> item6 - item10,
F3 -> item11 - item22,
F4 -> item23 - item30,
F5 -> item31 - item35,
F6 -> item36 - item41,
F7 -> item42 - item49,
F8 -> item50 - item55,
F9 -> item56 - item60,
F10 -> item61 - item65;
run; I assume that the problem is in my computer -- it is not powerful enough to run such computationally demanding procedures. So, I wanted to ask if anybody knows what kind of computer I need to have to run these analyses (and whether it's at all possible)? Thank you in advance.
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