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Please note that the program may not be able to read special characters such as ė, ö, ý, ş, etc. not used in English. Users should take care to avoid the use of these in either path or file names when using IRTPRO™.

All EXAMPLES (zip file)

Unidimensional Examples

Links to examples (PDF format):

• 1PL, 2PL, a special model with equality constraints, and trace lines and information curves for a 2PL model

• DIF Analysis – Complete Example

• Multiple groups (unidimensional) – Complete Example

• Scoring with IRTPRO – Complete Example

• Download Zip file with example files

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Links to examples (PDF format):

• Multidimensional analysis of the AACL data

• Exploratory factor analysis and bifactor analysis

• MCMC, multiple groups confirmatory factor analysis, MCMC graphics and simulation studies

  • Zip file with example files

• Testlet Response Theory and two-tier analysis

• Download Zip file with example files

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• Traditional examples (zip file)

• By Dataset examples (zip file)

• IRT simulation

• Fixed Theta estimation

  • Zip file with example files