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 IRTPRO trial license
  • Please note that the only limitations of the free IRTPRO trial license are that it expires 15 days after activation and that technical support is not available.
  • IRTPRO trial licenses are delivered via email on the same or the next business day.

    Instructions

    • Use the URL below to save the data file IRTPROTrialLicense.xls to a temporary location.
    • Open the saved IRTPROTrialLicense.xls.
    • Enter the data requested in the first row of  IRTPROTrialLicense.xls into the corresponding columns of the second row of  IRTPROTrialLicense.xls.
    • Save the revised copy of IRTPROTrialLicense.xls.
    • Compose an email message to SSI Customer Support with the subject line IRTPRO Trial License.
    • Attach the saved copy of IRTPROTrialLicense.xls to the email message to SSI Customer Support.
    • Send the email message to SSI Customer Support.

      Download IRTPROTrialLicense.xls

F  Free IRTPRO student edition
  • Please note that the IRTPRO student edition 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

F   Free BILOG-MG trial edition
  • Please note that the only limitations of the free BILOG-MG trial edition are that it expires 15 days after installation and that the statistical applications cannot be run in a Command Prompt window.

Download BILOGMG3TrialSetup.exe

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

Download PARSCALE4TrialSetup.exe

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