Programming the statistical procedures from SAS

Proc IRT (v9.4): item information and test information functions

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Proc IRT (v9.4): item information and test information functions

Dear All,

 

I am running a Item Response Theory Analysis of a patients' satisfaction survey. I use a graded response model.

 

This is the code:

 

Title 'IRT - Satisfaction Scale - Form1: Unidimensional';
proc irt data=[data] plots=(all) ;

var q24 q17 q20 q25 q19 q22 q27 q11;
by wave;
run;

 

I call the plots for Item information and test information functions but I would also like to know the exact estimates of the max information and location parameters of such curves (either in table format or superimposed in the graph). I cannot find a way to call this output in PROC IRT. Could you please help me?

 

Thanks in advance,

 

Luca

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