Scientific Software International (SSI) publishes statistical data analysis software: LISREL (structural equation model/SEM, survey generalized linear model/SGLIM), HLM (hierarchical linear modeling, multilevel model), SuperMix (mixed models, mixed-effects program, MIXREG, MIXOR, MIXNO and MIXPREG) and Item Response Theory/IRT (BILOG-MG, MULTILOG, PARSCALE)Scientific Software International (SSI) publishes statistical data analysis software: LISREL (structural equation model/SEM, survey generalized linear model/SGLIM), HLM (hierarchical linear modeling, multilevel model), SuperMix (mixed models, mixed-effects program, MIXREG, MIXOR, MIXNO and MIXPREG) and Item Response Theory/IRT (BILOG-MG, MULTILOG, PARSCALE)Scientific Software International (SSI) publishes statistical data analysis software: LISREL (structural equation model/SEM, survey generalized linear model/SGLIM), HLM (hierarchical linear modeling, multilevel model), SuperMix (mixed models, mixed-effects program, MIXREG, MIXOR, MIXNO and MIXPREG) and Item Response Theory/IRT (BILOG-MG, MULTILOG, PARSCALE)


F  Free student edition
  • Please note that the student edition of IRTPRO for Windows restricts the number of items, the number of persons, and the number of dimensions of the IRT analysis, and that technical support is not available.

    Student edition of IRTPRO for Windows

I   Installation instructions for internet installation applications
F   Free 15-day trial edition of IRTPRO 2.1 for Windows
  • Please note that the only limitation of the 15-day trial edition of IRTPRO for Windows is that it expires 15 days after installation.

Free 15-day trial edition of IRTPRO for Windows (October 2011)

F   Free 15-day trial edition of BILOG-MG 3 for Windows
  • Please note that the only limitation of the 15-day trial edition of BILOG-MG for Windows is that it expires 15 days after installation.

Free 15-day trial edition of BILOG-MG for Windows (August 2008)

 

F   Free 15-day trial edition of PARSCALE 4 for Windows
  • Please note that the only limitation of the 15-day trial edition of PARSCALE for Windows is that it expires 15 days after installation.

Free 15-day trial edition of PARSCALE for Windows (August 2008)

F   Free 15-day trial edition of TESTFACT 4 for Windows
  • Please note that the only limitation of the 15-day trial edition of TESTFACT for Windows is that it expires 15 days after installation.

Free 15-day trial edition of TESTFACT for Windows (August 2008)

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