PARSCALE for operational purposes includes, but is not limited to, test/assessment calibration, scoring, linking or standard setting for a client, product, or student/employee evaluation.

The flexibility and the wealth of information provided by this program have kept it in regular use by researchers around the world. The program offers the following:

• One, two, and three-parameter logistic models
• Samejima’s model for graded responses
• Master’s partial credit model
• Generalized partial credit model
• Analysis of rating scale items such as open-ended essay questions
• Analysis of multiple-choice items
• Differential item functioning (DIF)
• Analysis of mixtures of item types
• Rater’s-effect analysis
• Multiple-group polytomous item response models
• Presentation quality IRT graphics, can be imported in Word, Access, etc.