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Xcalibre: Item Response Theory (IRT) Software That's Actually User-Friendly

Automatically create item response theory tech reports in MS Word, complete with hundreds of easy-to-understand embedded tables, graphs, and narratives. Navigate a straightforward UI with no 1980s command code. Save psychometrician time and costs!

item person map

What is Xcalibre?


All options are displayed in a clean, simple interface. No coding skills required!

Automated Reports

Save hours of time – Xcalibre copies and pastes all the tables/graphs into a narrative report for you

IRT Models

Supports all major IRT models out of the box – dichotomous or polytomous

Flexible & Powerful

Analyze large data sets, perform equating studies, improve items with classical distractor analysis

Designed to help more practitioners implement Item Response Theory

The point-and click interface means that you spend more time on evaluating and improving your assessment, not fighting with code errors.  Simply select your files, IRT models, and other options, then click Run.  Supports both dichotomous and polytomous items, including both at the same time.

xcalibre irt models

Output that is easy to read

Clear, concise tables, embedded graphics, and explanatory narratives allow you to easily understand results.  Includes comprehensive item response theory analysis at both the item and test level (TIF, TRF, etc.).  Classical statistics are added where useful.

Moreover, it is all in Word so you can easily annotate results!  Save hours of copy-and-paste from ASCII tables and manually created graphs from other software.

Download Xcalibre

Xcalibre 4 is available as a free version limited to 50 items and 50 examinees. This allows you to get familiar with the program immediately, and start learning the advanced methods of item response theory.

Please fill out the form to sign up, and you will receive a link to download Xcalibre.

How is IRT better than Classical Test Theory?

Stronger Science

Designed specifically to address important psychometric issues

Better Equating

Superior at equating multiple forms/years

Enables CAT

IRT enables computerized adaptive testing (CAT)


Classical test theory results are notoriously sample-specific

Better Measurement

More precise scores, for more examinees

Upgrade to Full Version

The free version is always free.  To unlock the full functionality, click the button below to contact to contact our team; make sure to request Xcalibre in your notes!