sim.dat {ACTCD}

Simulated data

Description

The data are simulated based on the DINA model (Junker & Sijtsma, 2001).

Usage

data(sim.dat)

Format

A 500 \times 14 binary matrix.

Details

This data set contains responses of 500 examinees to 14 items and is used to demonstrate the functions in this package. The DINA model with a given Q-matrix (sim.Q) was used to generate data and the true values for guessing and slipping parameters are fixed to 0.2.

References

Junker, B., & Sijtsma, K. (2001). Cognitive Assessment Models with Few Assumptions, and Connections with Nonparametric Item Response Theory. Applied Psychological Measurement, 25(3), 258-272.

Examples

data(sim.dat)