Description

Artificial data set of 3 items, 2 time points and 2 groups for LLRA. It is example 6 from Hatzinger and Rusch (2009).

Usage

Format

A data frame with 60 observations of 6 variables.

V1

Answers to item 1 at time point 1

V2

Answers to item 2 at time point 1

V3

Answers to item 3 at time point 1

V4

Answers to item 1 at time point 2

V5

Answers to item 2 at time point 2

V6

Answers to item 3 at time point 2

Details

This is a data set as described in Hatzinger and Rusch (2009).

References

Hatzinger, R. and Rusch, T. (2009) IRT models with relaxed assumptions in eRm: A manual-like instruction. Psychology Science Quarterly, 51, pp. 87–120.

Examples