An Artificial LLRA Data Set
Artificial data set of 3 items, 2 time points and 2 groups for LLRA. It is example 6 from Hatzinger and Rusch (2009).
A data frame with 60 observations of 6 variables.
Answers to item 1 at time point 1
Answers to item 2 at time point 1
Answers to item 3 at time point 1
Answers to item 1 at time point 2
Answers to item 2 at time point 2
Answers to item 3 at time point 2
This is a data set as described in Hatzinger and Rusch (2009).
Hatzinger, R. and Rusch, T. (2009) IRT models with relaxed assumptions in eRm: A manual-like instruction. Psychology Science Quarterly, 51, pp. 87–120, http://erm.r-forge.r-project.org/psq_1_2009_06_87-120.pdf
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