Adam M. Enders

Day 1: Introductory Material, Data Theory, & Measurement

• MORALS Optimal Scaling R code

• MORALS Optimal Scaling data

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Day 2: The Summated Rating Model, Reliability, & Cumulative Scaling

• SRM and Reliability R code

• SRM and Reliability data

• Mokken Scale Analysis code

• Mokken Scale Analysis data

• Suspicion 2014 CCES data

• Ordinal MSA code (for suspicion data)

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Day 3: Item Response Theory, Unfolding, & SVD

• Parametric IRT code

• MUDFOLD model code

• Parametric Unfolding code

• Understanding the SVD

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Day 4: PCA & Factor Analysis

• SVD and Biplot code

• PCA Example code

• Political Sophistication data, 2012 ANES

• State Economy Indicators data

• Nonlinear (Categorical) PCA

• Factor Analysis example code

• Factor Analysis "by hand" code

• Group Thermometers, 2012 ANES data

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Day 5: Multidimensional Scaling

• Classical MDS and MDS "by hand" code

• Country Similarities data

• Metric and Nonmetric MDS via smacof code

• 2004 ANES Thermometer data

• Interpreting MDS Solutions code

• Degenerate Solutions and Correlations as Input code

• Vector Model of Unfolding code

• Weighted MDS code

• Weighted MDS data

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