Description Format References Examples
Data frame for item design matrix with binary responses for the verbal aggression data. There are five columns for for intercept, four item covariates (dowant, otherself, blame, express).
A data frame in size 24 by 5.
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do:1 vs. want:0
other-to-blame:0, self-to-blame:1
curse:0.5, scold:0.5 vs. shout:-1
scold:-1 vs. curse:0.5, shout:0.5
De Boeck, P. and Wilson, M. (2004), Explanatory Item Response Models, Springer.
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