The data are simulated based on the DINA model (Junker & Sijtsma, 2001).
A 500 \times 14 binary matrix.
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.
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.