【正文】
。? quit。? model item + item*step。? show cases !est = latent 。? Format id 17 responses 934。? show cases !est = mle 。 Items 21 to 30 appear in the group 2 and group 3 。(total 40 items) Items 11 to 20 appear in the group 1 and group 2。? show cases !est = eap 。 ModelItem18Rating Scale Model? Datafile 。? show cases !est = wle 。? recode (3,2,1) (2,1,0)。? itanal 。? show cases !est = mle 。? Quit。? model item + step。? Show 。Items 21 to 50 appear in the group 1 and group 2 (total 70 items)To pare two kinds of test scoring strategies applying item