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Adam M. Enders

Assistant Professor

Department of Political Science

University of Louisville

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  • Curriculum Vitae

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    Introductory Material

    • MORALS Optimal Scaling code

    • MORALS Optimal Scaling data

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    Classical Test Theory, the Summated Rating Model, and Reliability​

    • SRM and Reliability code

    • SRM and Reliability data

    ​

    (Unidimensional) Item Response Theory

    • Mokken Scale Analysis code

    • Mokken Scale Analysis data

    • Suspicion 2014 CCES data

    • Parametric IRT code

    • DIF code

    • DIF data

    ​

    (Unidimensional) Unfolding

    • Unfolding code

    ​

    Singular Value Decomposition, Biplot, and PCA

    • SVD and Biplot code 1

    • SVD and Biplot code 2

    • Political Sophistication data

    • Banks' (2005) data

    • PCA code

    • Categorical (Nonlinear) PCA code

    ​

    Factor Analysis

    • Factor Analysis code

    • Factor Analysis "by hand" code

    • Group Feeling Thermometer data

    • FA "SCOTUS legitimacy" example

    • Legitimacy data

    • Nonlinear EFA code

    ​

    Multidimensional Scaling and Extensions

    • Classical MDS and MDS "by hand" code

    • Metric and Nonmetric MDS via smacof code

    • Country Similarities data

    • 2004 ANES Thermometer data

    • Interpreting MDS Solutions code

    • Degenerate Solutions and Correlations as Input code

    • WMDS code

    • Vector unfolding model code

    • Vector model data

    • Multidimensional unfolding code

    ​

    Correspondence Analysis

    • CA "by hand" code

    • CA and MCA code

    • MCA (vote choice) data

    ​

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