Documentation Example 2 for PROC IRT
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: IRTEX2 */
/* TITLE: Documentation Example 2 for PROC IRT */
/* */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: */
/* PROCS: IRT */
/* DATA: */
/* */
/* SUPPORT: Xinming An */
/* REF: PROC IRT, EXAMPLE 2 */
/* MISC: */
/****************************************************************/
data IrtMulti;
input item1-item10 @@;
datalines;
1 0 0 0 1 1 2 1 2 1 1 1 1 1 1 3 3 3 3 3 0 1 0 0 1 1 1 1 1 1 1 0 0 1 0
1 2 3 2 2 0 0 0 0 0 1 1 1 1 1 1 0 0 1 0 1 3 3 1 2 0 0 0 0 0 1 1 3 3 2
0 0 1 0 0 1 2 2 3 2 0 1 0 0 1 1 1 2 2 2 0 0 0 0 0 2 2 3 3 2 0 1 0 1 0
2 3 3 3 3 0 0 1 0 1 1 2 3 2 3 1 1 1 1 1 2 2 3 2 2 0 0 0 0 1 1 2 2 3 1
1 0 1 1 1 2 3 3 2 3 0 1 0 0 1 1 2 3 3 3 1 0 1 1 1 2 3 3 3 3 0 1 0 1 1
3 2 3 3 2 1 1 1 0 0 1 3 3 2 1 1 1 0 0 1 2 3 3 3 3 0 1 1 1 1 1 2 1 2 3
1 0 0 1 1 3 1 1 1 1 1 0 0 0 1 1 1 3 3 1 0 0 0 0 1 1 3 3 3 3 0 0 0 0 0
1 1 1 3 2 1 0 0 0 0 1 3 3 3 3 1 1 0 1 1 3 1 1 3 3 1 0 1 1 1 1 3 1 1 1
1 1 1 1 1 2 3 2 3 3 0 0 1 0 0 2 2 2 1 1 0 0 1 0 1 1 2 3 3 3 1 1 1 1 1
1 1 2 1 2 0 0 0 0 1 3 1 1 1 2 1 1 1 1 1 2 2 3 1 3 0 0 0 0 1 2 2 3 2 3
1 1 1 1 1 3 3 3 1 3 1 1 1 1 1 1 3 3 3 1 0 1 0 0 0 2 2 2 2 3 0 1 0 1 0
2 2 3 2 2 1 0 0 1 1 1 1 2 1 3 1 0 0 0 1 3 1 2 2 1 0 0 0 0 0 1 3 1 3 1
0 1 1 0 0 2 1 3 2 1 0 0 0 0 1 2 2 3 2 2 0 0 0 0 0 1 1 2 2 2 0 0 0 1 1
1 1 1 1 1 0 0 0 0 1 3 1 3 2 2 0 0 0 0 0 2 1 1 2 1 0 0 0 1 1 1 3 2 2 2
0 0 0 0 0 2 1 2 3 2 1 1 1 0 0 1 3 1 2 2 0 0 0 0 1 2 2 2 2 3 0 1 1 1 1
2 2 3 3 2 0 0 1 0 1 2 2 3 2 1 1 0 1 1 1 3 1 1 2 2 0 0 0 0 1 1 3 3 2 3
1 1 1 0 0 1 3 3 2 1 0 0 0 0 0 2 1 1 2 1 0 0 0 1 1 2 3 3 3 2 0 0 0 0 0
1 2 1 2 2 0 0 1 0 1 3 1 1 1 1 0 1 0 0 1 1 2 1 2 1 0 0 1 0 0 3 1 3 2 3
0 0 0 0 0 1 1 1 3 1 1 0 0 1 0 1 1 1 1 1 0 0 1 1 1 2 1 2 3 3 0 0 0 0 0
3 2 2 3 2 0 0 0 0 1 2 2 2 2 2 0 0 1 1 1 2 2 3 3 3 0 0 1 0 0 2 2 3 3 2
0 1 1 0 1 2 3 1 2 3 1 0 1 1 1 2 2 2 2 1 1 1 0 1 1 1 1 1 3 3 1 1 0 1 1
2 3 1 3 3 0 0 0 0 1 3 1 2 1 1 0 0 0 0 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1
0 0 0 0 1 3 1 3 1 1 1 1 1 0 1 1 1 2 2 2 0 0 0 1 0 1 1 1 3 1 0 0 0 1 1
1 1 2 1 1 1 0 1 1 1 1 3 1 1 2 1 1 1 1 0 3 3 3 3 3 1 1 0 1 0 3 1 3 1 1
0 0 0 0 0 1 2 2 1 1 0 0 1 0 1 2 2 2 3 1 0 1 1 1 0 2 2 3 2 2 0 0 0 0 1
3 1 3 3 1 1 1 1 1 1 3 2 2 2 3 1 0 1 1 1 1 1 3 3 3 0 0 1 0 1 2 1 2 1 2
0 0 1 1 1 2 1 2 3 2 1 1 1 1 1 3 2 3 3 3 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1
1 2 2 2 3 1 0 1 0 1 1 3 3 3 3 0 0 0 0 0 2 1 1 1 1 1 0 1 0 1 1 1 3 2 3
0 0 0 0 0 3 1 1 2 1 0 1 1 0 0 1 2 2 3 1 1 0 1 1 1 3 3 3 2 2 1 1 0 1 0
1 2 2 2 2 1 0 0 0 0 1 1 1 2 1 0 0 0 0 0 3 2 2 2 1 0 0 0 1 1 3 3 3 2 3
0 0 0 0 1 2 2 2 3 2 0 0 0 0 1 2 2 2 2 2 0 0 0 0 0 2 1 2 2 2 0 0 1 1 1
3 3 3 3 3 1 1 1 0 1 1 2 2 1 1 0 0 0 0 1 2 3 3 3 2 0 0 1 0 1 2 3 3 2 2
1 1 1 0 1 2 3 3 2 3 1 0 0 0 1 1 3 2 3 3 1 0 0 0 1 2 2 1 2 2 0 1 0 1 0
1 3 1 3 3 0 0 0 0 0 1 1 1 1 1 0 1 0 0 0 3 2 1 2 3 0 0 0 1 0 2 1 1 2 1
1 1 0 0 1 3 3 1 1 1 1 1 1 1 1 3 2 1 1 2 1 0 1 0 1 3 2 3 2 3 1 1 1 0 1
2 2 2 2 2 1 1 0 1 1 2 3 3 2 3 0 0 0 1 0 1 1 1 1 3 1 0 1 1 1 2 3 3 3 3
0 0 0 1 1 2 3 1 1 1 1 1 0 1 1 3 1 2 2 2 0 0 0 1 1 1 2 1 2 3 1 1 1 0 1
1 1 2 1 2 1 1 1 1 1 2 3 3 1 3 0 0 1 1 0 2 2 1 1 1 1 0 0 0 1 3 1 2 2 2
0 1 1 1 1 1 2 1 2 3 0 0 0 0 1 3 3 2 3 2 0 0 0 1 0 1 1 1 1 1 0 0 0 0 0
1 3 3 2 1 0 0 0 1 1 1 1 2 2 2 0 1 0 0 1 3 1 1 2 1 0 0 1 0 0 1 2 2 2 2
0 0 0 0 1 2 2 2 2 3 1 0 1 1 0 3 2 1 3 1 0 0 0 0 1 3 2 3 2 1 0 1 1 1 0
2 2 3 3 2 1 0 0 1 0 3 2 3 2 3 0 1 0 0 1 2 2 3 1 2 0 0 0 0 0 2 1 1 1 1
0 0 0 0 1 3 2 2 1 3 0 0 0 1 1 1 3 1 1 3 0 0 0 1 1 2 1 1 1 1 1 1 1 1 1
3 3 2 2 2 0 0 1 1 1 1 2 2 2 3 0 1 1 0 0 1 3 1 3 3 1 0 0 1 1 2 3 3 2 3
1 1 1 1 1 3 2 3 2 3 1 0 1 0 1 1 3 3 2 3 1 1 1 1 0 3 2 3 1 1 0 1 1 0 1
1 2 3 2 3 1 1 1 0 1 1 3 2 2 2 0 0 0 1 0 1 2 1 1 1 0 0 0 0 0 1 1 1 2 2
1 1 1 1 1 2 3 3 3 2 1 1 1 0 1 2 3 3 2 1 1 1 1 1 1 2 2 3 2 3 0 0 0 0 1
2 2 2 2 3 0 0 0 0 1 2 2 2 2 2 0 0 1 0 1 2 1 2 3 3 1 1 0 1 1 3 2 3 3 1
0 0 1 0 0 1 2 3 2 1 0 0 1 0 0 1 2 2 2 1 1 0 0 0 0 1 2 2 1 2 1 0 0 1 0
2 2 2 3 2 0 0 1 1 1 2 1 3 2 2 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1
0 0 0 1 1 1 3 3 2 2 0 0 0 0 0 1 2 3 3 2 0 0 0 0 0 2 2 2 3 3 1 0 1 0 1
3 1 3 3 2 0 1 1 0 1 1 3 2 3 2 0 0 0 1 1 2 1 2 2 1 0 0 0 0 0 3 1 1 2 1
0 0 0 0 1 1 1 1 2 1 0 1 1 1 0 1 3 3 3 2 1 0 0 1 1 3 3 3 3 3 0 0 0 0 0
1 1 2 3 3 1 0 1 1 1 2 3 3 1 3 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3
1 0 0 0 1 3 1 3 3 1 0 0 0 0 1 1 1 1 1 1 0 0 0 1 1 1 2 2 1 3 0 0 0 0 0
2 1 1 2 2 0 0 0 1 0 2 2 3 3 3 1 0 0 0 0 2 2 2 2 2 0 0 0 1 1 1 1 3 2 2
0 1 1 0 0 3 2 3 2 3 0 0 0 0 1 2 2 2 2 2 1 1 1 1 1 2 2 3 3 3 0 0 0 1 1
1 3 3 1 1 1 0 1 0 1 3 2 3 1 2 0 0 0 0 0 2 2 2 2 2 1 0 0 1 1 1 2 3 3 3
0 0 0 0 1 2 2 2 1 2 1 1 0 1 0 3 3 1 3 1 0 0 0 0 1 3 3 2 1 3 1 0 0 0 0
2 2 2 2 2 0 0 1 0 1 1 3 2 1 1 1 0 1 0 1 1 3 3 2 1 0 1 0 0 1 1 2 1 2 2
0 0 0 0 1 2 2 2 1 1 1 1 1 0 1 2 3 3 2 3 1 1 1 1 1 1 2 3 3 2 0 0 0 0 0
1 2 2 1 2 0 1 0 0 1 3 3 3 3 3 1 1 1 1 1 3 1 3 2 3 1 1 1 1 0 1 2 3 3 1
0 0 0 0 1 1 2 3 2 2 1 0 0 1 1 3 3 3 2 3 0 1 1 1 0 3 2 3 3 1 0 0 0 0 1
1 3 3 3 3 0 0 0 0 0 1 1 3 2 3 0 0 0 1 0 1 1 2 1 3 1 1 1 1 0 2 3 3 3 2
1 1 1 1 1 2 2 2 2 2 1 1 1 0 1 2 3 3 3 3 0 1 0 0 0 3 3 2 1 2 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 2 3 3 3 2 1 1 1 1 0 1 3 2 3 2 0 0 0 1 1 1 1 3 1 1
0 0 1 0 0 1 1 1 3 2 1 0 1 1 0 1 1 3 3 3 0 0 0 0 0 2 2 2 2 2 1 1 0 0 1
1 3 3 1 3 1 1 0 0 1 2 3 3 3 1 1 1 0 1 1 1 3 1 3 2 0 0 1 1 0 2 1 2 3 1
1 1 1 1 1 1 2 3 3 3 0 0 0 0 1 1 1 1 1 2 1 1 0 0 1 3 3 3 1 2 1 1 1 1 1
3 3 1 2 3 0 1 0 0 1 1 2 2 2 2 0 0 0 0 1 1 1 1 1 1 1 0 0 0 1 2 3 2 3 2
1 0 1 0 1 2 3 3 3 3 0 0 0 0 0 3 1 1 1 1 1 0 1 1 1 1 1 1 2 2 1 1 1 1 1
3 3 1 1 1 0 1 1 0 1 1 2 3 2 2 0 0 0 0 0 3 1 2 2 2 1 0 0 0 0 1 1 1 1 2
1 0 0 1 0 2 1 1 3 1 0 0 0 0 0 1 1 1 2 2 0 0 1 1 1 2 2 3 2 2 0 0 1 0 0
1 2 3 2 1 0 0 0 0 1 2 2 1 1 1 1 1 1 1 1 3 3 3 1 1 0 1 0 0 0 3 2 3 2 2
1 1 0 0 1 3 3 3 3 3 1 1 1 0 1 2 3 3 3 3 0 1 1 0 0 2 3 3 3 1 1 0 1 0 1
1 2 3 1 1 1 0 0 0 0 2 3 2 2 3 0 0 0 0 1 3 2 3 2 2 1 1 1 1 0 3 3 3 2 3
0 0 0 1 1 2 3 3 3 3 0 0 0 1 0 2 3 2 2 1 1 1 0 0 1 3 3 1 3 1 0 1 0 0 1
2 1 2 2 2 1 1 1 0 1 2 2 2 3 1 1 0 0 0 1 2 2 2 2 2 1 1 1 1 1 3 3 3 3 3
0 1 1 0 1 2 2 2 3 2 1 1 1 1 1 3 3 3 3 3 1 1 1 1 1 3 3 2 3 3 1 0 0 0 1
3 3 2 3 1 0 0 0 0 0 1 1 1 1 3 0 0 0 0 0 2 2 1 2 3 0 0 0 0 1 1 3 3 2 1
0 0 0 1 1 1 3 1 3 1 0 0 1 0 1 1 2 3 3 3 1 1 1 1 0 1 2 1 2 1 0 1 0 1 0
1 1 1 1 1 0 0 1 1 1 1 3 3 2 2 1 1 1 1 1 3 1 2 3 2 1 1 1 0 0 1 3 3 2 2
0 0 1 1 1 1 2 2 3 3 1 1 1 1 1 2 3 3 3 2 1 1 1 1 1 1 1 2 1 3 0 0 0 1 1
1 3 2 1 2 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 2 2 3 2 2 1 1 1 0 1 2 3 3 3 3
0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 1 1 1 2 3 0 0 0 1 0 1 2 3 1 3 0 0 0 0 0
1 2 3 3 2 0 0 1 1 1 1 2 3 3 1 1 1 1 1 1 2 3 3 3 2 0 0 0 0 1 3 3 2 3 3
0 0 0 0 1 2 2 2 2 1 0 0 0 0 1 2 3 2 2 2 1 0 1 1 1 2 3 2 3 3 0 0 0 0 1
1 3 1 1 2 0 0 0 1 0 2 1 2 1 1 0 0 1 0 0 1 2 2 1 3 1 0 0 1 1 1 3 2 3 3
1 0 0 0 1 3 1 3 3 3 0 1 1 1 1 3 3 2 3 2 1 1 1 0 0 2 2 2 1 1 0 0 0 1 1
2 2 3 3 3 1 1 0 1 1 2 3 2 3 2 1 1 1 1 1 2 3 3 3 3 0 0 0 0 0 3 1 1 2 1
1 1 0 0 1 1 3 3 2 3 0 0 0 1 1 2 2 3 3 3 0 0 0 1 0 1 3 3 1 1 1 0 1 1 0
2 3 3 1 3 1 0 0 1 1 3 3 3 1 3 0 1 1 0 1 1 1 2 2 2 0 0 0 0 0 2 3 2 3 2
0 1 0 0 0 2 3 2 3 2 0 0 0 0 1 1 3 3 2 2 1 0 1 1 1 1 3 3 1 3 0 1 0 1 1
3 3 3 3 1 0 0 0 0 0 1 1 1 1 2 0 0 0 1 0 1 1 1 1 1 0 1 1 0 1 3 2 3 3 3
0 0 0 0 1 3 3 3 1 2 0 0 1 0 1 2 3 3 3 2 1 1 1 0 0 1 1 2 2 2 0 0 1 0 0
2 1 1 1 2 0 0 0 0 0 1 1 2 1 1 0 0 1 0 0 2 2 1 2 1 0 0 0 1 1 1 3 2 2 1
0 0 0 1 1 1 2 1 2 3 0 0 1 0 1 2 3 2 2 2 0 1 0 1 1 1 3 3 3 2 0 0 0 0 1
2 2 2 2 3 1 1 1 0 1 1 2 3 2 2 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 1 1 1 2 1
1 0 0 1 1 3 1 2 1 3 0 0 0 0 0 1 1 2 2 3 1 0 0 1 0 3 2 2 2 1 0 0 1 0 1
3 2 3 3 2 1 0 0 1 0 1 1 1 2 1 0 0 1 0 1 1 1 1 3 1 0 0 1 0 0 1 2 2 2 2
1 1 1 0 1 3 1 1 1 1 0 0 0 0 0 3 1 3 1 3 1 0 0 0 1 3 1 2 2 3 1 0 0 0 1
3 1 3 1 1 0 0 0 0 1 1 1 2 1 2 0 0 0 1 1 1 3 3 2 2 1 1 1 0 1 2 3 3 3 3
0 0 1 0 0 2 2 2 2 1 0 1 0 0 1 1 3 2 2 1 0 0 0 1 1 1 1 1 1 3 1 1 0 1 0
2 3 3 3 3 0 0 0 1 1 1 2 1 1 3 0 0 0 0 1 1 3 3 3 2 1 0 1 0 1 1 3 1 1 1
0 0 0 0 1 1 1 3 3 1 1 1 1 1 1 2 3 3 2 1 1 0 0 0 0 1 3 2 2 2 1 0 1 0 1
1 1 3 3 2 0 0 0 1 0 2 2 3 3 2 1 1 0 0 1 1 3 3 2 2 0 0 0 0 1 1 3 2 1 3
1 0 0 0 0 1 1 3 1 3 1 1 0 1 0 3 1 2 2 3 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0
3 2 2 2 3 0 0 0 1 1 3 3 2 2 2 1 0 1 1 1 3 1 3 2 1 1 0 0 1 1 1 3 3 2 1
1 1 0 0 1 2 3 3 3 3 1 1 1 0 1 2 2 3 2 1 0 0 1 0 1 1 1 2 1 1 0 0 0 0 0
3 1 1 1 1 1 1 1 1 1 3 3 3 3 3 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 1 1 2 2 1
0 0 0 0 0 2 1 2 1 1 1 0 0 0 0 1 1 1 3 3 1 1 1 0 1 2 2 3 2 3 1 0 0 0 1
3 3 2 3 1 0 0 0 0 1 1 2 2 1 2 0 0 0 1 1 1 3 1 2 1 0 1 0 0 1 1 1 2 2 2
0 0 0 0 0 2 2 2 2 1 1 0 0 0 1 2 2 2 2 2 1 0 0 1 1 3 3 2 2 3 0 0 0 0 1
2 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 0 1 1 3 3 2 2 3 1 0 0 1 1 3 1 1 3 2
0 0 0 0 1 3 1 1 1 1 1 1 1 1 1 3 3 3 3 3 0 0 0 1 1 2 3 2 2 3 0 0 0 0 0
2 1 1 1 1 1 0 0 0 1 1 3 3 2 2 1 1 1 0 1 2 3 2 3 3 1 1 1 0 0 1 1 3 2 2
1 1 1 0 1 3 2 3 3 3 1 0 1 1 1 2 1 1 1 2 1 0 0 1 1 3 2 3 1 3 0 0 0 1 1
2 3 2 1 2 1 1 0 1 1 1 3 3 3 3 0 0 0 0 0 1 3 3 1 2 0 0 0 0 0 1 1 1 2 2
0 1 1 0 0 2 2 3 3 3 0 1 0 1 1 3 3 3 3 3 1 0 1 1 0 3 3 2 3 2 1 1 0 0 1
3 1 3 3 3 0 1 0 1 0 3 2 2 3 2 0 1 1 0 1 2 2 2 1 1 0 0 0 0 0 1 1 1 1 1
0 0 0 0 0 3 1 1 1 1 1 0 0 1 0 2 3 3 2 2 0 0 0 0 0 1 2 3 3 3 1 1 1 1 1
1 2 3 3 3 0 1 0 0 0 2 1 1 1 1 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 3 1 1 2 3
1 1 1 1 1 3 3 3 3 3 1 1 0 1 1 1 3 3 3 3 1 1 1 0 0 2 2 2 1 3 1 0 1 1 1
1 2 3 3 2 1 1 1 1 1 3 3 3 3 3 1 0 0 0 0 3 3 3 2 1 1 1 0 0 1 1 3 3 3 2
0 1 0 0 0 2 2 1 1 1 0 1 1 0 0 3 2 3 3 1 1 0 0 0 0 2 1 3 2 3 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0 1 2 1 1 2 1 1 0 1 1 3 3 3 2 3 0 0 0 1 1 3 2 3 2 3
0 0 0 1 0 2 3 2 3 2 0 0 0 0 0 1 1 2 2 1 1 0 1 1 0 3 2 2 3 3 0 1 0 0 1
2 3 3 3 3 0 0 0 0 0 2 3 3 1 1 0 1 0 0 0 1 2 3 3 3 1 1 0 1 0 2 3 3 2 2
1 1 1 0 1 3 3 3 3 3 0 0 0 0 1 1 1 1 2 1 1 1 1 0 1 1 1 2 2 2 1 0 0 1 1
2 3 3 3 3 0 0 1 1 1 1 3 1 1 3 0 0 1 1 1 3 3 3 3 3 0 0 1 0 1 2 2 2 2 2
0 0 0 0 1 3 1 3 3 3 0 0 1 0 1 3 2 2 3 2 0 0 1 1 1 2 3 3 2 3 0 0 0 0 1
3 3 3 3 2 1 0 0 0 1 1 1 3 1 3 0 0 0 1 1 1 3 3 2 2 1 1 1 1 0 3 1 3 2 2
1 1 1 1 0 2 1 3 2 3 1 0 0 0 0 2 1 2 2 3 0 0 0 0 1 1 3 1 1 1 0 0 1 0 0
3 2 1 1 2 0 0 0 0 1 1 3 3 3 3 0 0 0 0 1 2 2 2 3 3 1 0 0 0 0 1 1 3 3 2
1 0 1 1 1 2 2 3 2 2 1 0 1 1 1 2 3 3 3 3 0 0 1 0 1 2 2 3 2 2 1 0 0 0 1
1 1 2 2 2 0 0 0 0 1 1 2 2 2 2 1 1 1 0 1 2 2 3 2 2 0 0 0 1 0 2 2 1 1 1
1 0 1 0 1 3 2 3 3 2 1 1 0 1 0 2 3 2 1 3 1 0 0 1 1 2 2 3 3 3 1 0 1 0 1
3 3 3 3 3 0 0 0 0 1 1 1 2 2 2 0 0 0 0 1 1 2 3 3 3 1 1 1 1 0 2 3 3 3 2
0 1 1 0 1 2 3 2 2 3 0 0 1 0 1 1 1 2 3 2 1 1 1 0 0 2 3 3 3 1 0 1 1 1 1
3 3 1 3 2 0 0 0 1 0 1 3 2 2 1 0 0 0 0 1 1 2 2 2 3 1 0 1 0 1 2 2 3 2 1
1 0 0 1 1 1 2 2 3 1 0 1 0 1 0 1 3 1 1 1 0 1 1 0 1 3 3 3 3 2 1 0 1 0 0
1 2 1 1 1 1 0 1 1 0 1 3 3 1 3 1 1 0 1 0 2 2 2 2 3 1 1 0 1 1 3 2 3 2 2
0 0 0 1 0 2 2 3 1 2 0 0 0 1 0 2 3 3 3 2 0 1 0 0 1 2 2 1 2 1
;
ods graphics on;
proc irt data=IrtMulti nfactor=2 plots=scree;
var item1-item10;
run;
proc irt data=IrtMulti;
var item1-item4 item6 item5 item7-item10;
factor Factor1->item1-item4 item6,
Factor2->item5 item7-item10;
run;
