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)


D  Data
  • Barnes & Kaase (1979) conducted a cross-national survey to obtain information on conventional and unconventional forms of political participation in industrial societies. The survey is known as the Political Action Survey.  
  • The survey included several attitude and perception statements to which the respondents had to respond with one of:
    • agree strongly
    • agree
    • disagree
    • disagree strongly
    • do not know
    • no answer  
  • Amongst others, the following statements were administered to each USA respondent.
    • "People like me have no say in what the government does."  (NOSAY)
    • "Sometimes politics and government seem so complicated that a person like me cannot really understand what is going on."  (COMPLEX)
    • "I don't think that public officials care much about what people like me think."  (NOCARE)
    • "Generally speaking, those we elect to Congress in Washington lose touch with people pretty quickly."  (TOUCH)
    • "Parties are only interested in people's votes but not in their opinions." (INTEREST)
  • The file EFFICACY.PSF in the ORDINAL folder contains the responses to these statements from a sample from 1719 respondents. The first portion of EFFICACY.PSF is shown in the following PSF window.

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A  Analysis
  • Select the Open option from the File menu to load the Open dialog box.
  • Select the PRELIS Data (*.psf) option on the Files of type drop-down list box. 
  • Browse for the file EFFICACY.PSF in the ORDINAL subfolder and select it.
  • Click on the Open button to open EFFICACY.PSF in a PSF window.
  • Select the Ordinal Factor Analysis option on the Statistics menu as shown below

    to load the Ordinal Factor Analysis dialog box.

  • Select all the labels in the Variable List list box.
  • Click on the Select button.
  • Activate the Logistic radio button of the Item response function section.
  • Enter 2 in the Number of Factors string field to produce the following Ordinal Factor Analysis dialog box.

  • Click on the Run button to produce the following text editor window for EFFICACY.OUT.

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