Hi, I found your post when I have the same problem. I know it is a long time ago and you may have solved and forgot this already. But for the future use, I put my solution here. I used output option to output the TIC values for both models, merge them using theta (the trait) and then create the overlay graph use proc sgplot. Hope this helps others like me. Thanks, Luna In proc irt, use this to output the TIC dataset. ods output TestInfoCurve=xx;
... View more