Example Data: Linear Hierarchical Categories

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Description

Simulated example data set with linear hierarchical categories.

Format

An IRT response matrix with 300 persons and 10 three-category items.

References

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/.

Examples

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str(linresp)
mapping <- cbind(c(0,1,1), c(NA,0,1))
str(linrespT <- dendrify(linresp, mapping))