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 trial license for IRTPRO 2.1 for Windows
  • Please note that the only limitations of the free trial license for IRTPRO for Windows are that it expires 15 days after activation and that technical support is not available.

  • Free trial licenses are delivered via email on the same or the next business day.

    Instructions

    • Use the URL below to save the data file IRTPROTrialData.xls to a USB flash drive.
    • Enter the data requested in the first row of  IRTPROTrialData.xls into the corresponding cells of the second row of  IRTPROTrialData.xls.
    • Save the revised copy of IRTPROTrialData.xls.
    • Send the saved copy of IRTPROTrialData.xls as an email attachment to mels@ssicentral.com.

      Data file for the free trial license for IRTPRO 2.1 for Windows

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 trial edition of BILOG-MG 3 for Windows
  • Please note that the only limitation of the free trial edition of BILOG-MG for Windows is that it expires 15 days after installation and that the statistical applications cannot be run in a Command Prompt window.

Free trial edition of BILOG-MG for Windows

F   Free trial edition of PARSCALE 4 for Windows
  • Please note that the only limitation of the free trial edition of PARSCALE for Windows is that it expires 15 days after installation and that the statistical applications cannot be run in a Command Prompt window.

Free trial edition of PARSCALE for Windows

 

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