Homework 9: 
Fitting the Generalized Partial Credit Model with Parscale
>COMMENT
Estimating a Generalized Partial Credit Model with all 
the "default" settings.  Note that you will have to change 
the directory names, and perhaps file names given below. 
>FILE    DFNAME='D:/778/ALET.DAT',SAVE;
>SAVE    PARM='D:/778/ALET.PAR',SCORE='D:/778/ALET.SCO';
>INPUT   NIDCHAR=6,NTOTAL=4;
(6A1,4A1)
>TEST    NBLOCK=4;
>BLOCK1  NITEMS=1,NCAT=8,ORIGINAL=(0,1,2,3,4,5,6,7);
>BLOCK2  NITEMS=1,NCAT=7,ORIGINAL=(0,1,2,3,4,5,6);
>BLOCK3  NITEMS=1,NCAT=7,ORIGINAL=(0,1,2,3,4,5,6);
>BLOCK4  NITEMS=1,NCAT=6,ORIGINAL=(0,1,2,3,4,5);
>CAL     PARTIAL,LOGISTIC;
>SCORE   MLE,PRINT;