topic Can PROC IRT be used for a scoring run? in Statistical Procedures

Can PROC IRT be used for a scoring run?

LeeBranumMartin — Wed, 30 Nov 2016 15:22:58 GMT

Can PROC IRT be used for a scoring run? If I ran a calibration on a large sample with an item bank, and then stored those item parameters, can I then apply those item parameters to another sample? Essentially, this is using PROC IRT with fixed item parameters so that I can estimate person ability scores using the known item characteristics.

I have searched the documentation, but cannot find a way to fix item parameters (even though I can in other procedures, like CALIS and MIXED).

Re: Can PROC IRT be used for a scoring run?

Rick_SAS — Wed, 30 Nov 2016 15:30:43 GMT

Here is a link to the PROC IRT documentation.

Use the OUTMODEL= option to create a SAS data set that contains the parameter estimates for the model.

Then use the INMODEL(SCORE)= option in a separate call to score a new set of data..

The doc for the INMODEL= option has the details.

Re: Can PROC IRT be used for a scoring run?

LeeBranumMartin — Wed, 30 Nov 2016 15:36:16 GMT

Thanks for the INMODEL hint. I used that for a search and found a worked example: http://support.sas.com/documentation/cdl/en/statug/68162/HTML/default/viewer.htm#statug_irt_examples05.htm