Simulated example data set for a model with nested hierarchical latent variables.
An IRT response matrix with 300 persons and 30 binary items.
De Boeck, P. and Partchev, I. (2012). IRTrees: Tree-Based Item Response Models of the GLMM Family, Journal of Statistical Software – Code Snippets, 48(1), 1–28. http://www.jstatsoft.org/v48/c01/.
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