ABSTRACT
Xcalibre 4™ is a software program designed not only to perform item response theory (IRT) calibration, but also to go the additional step of creating narrated, editable reports with hundreds of embedded tables and graphics.Xcalibre has a distinguished lineage dating back to a DOS version in the 1980s and was completely redesigned in 2011 to provide greatly enhanced functionality. Some of these major areas of functionality include polytomous models, distractor analysis of multiple-choice items, differential item functioning (DIF), and extensive reporting and graphics.
