Item Factor Analysis: A Primer and New Open-Source Implementation
Pritikin, Joshua, Psychology - Graduate School of Arts and Sciences, University of Virginia
Boker, Steven, Department of Psychology, University of Virginia
Schmidt, Karen, Department of Psychology, University of Virginia
Von Oertzen, Timo, Department of Psychology, University of Virginia
Have you collected survey data? Here is how to analyze it and why. Interval scale data is obtained from nominal or ordinal data by partitioning data conditional on examinee skill. Item Factor Analysis (a.k.a. Item Response Theory) fits a model to these types of data. Underlying mathematics are presented interwoven with insights gleaned from the experience of writing an open-source software implementation from scratch. Simulation studies, with complete source code included, demonstrate the accuracy of parameter recovery.
MA (Master of Arts)
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