12.9 Exercise

Use data2 and Q2 for the following exercises.

• Conduct Q-matrix validation using different methods. Do they produce the same suggestions?

• Let’s use the suggested Q-matrix from the stepwise procedure for the following analyses:

  • Fit the G-DINA model to the data using this suggested Q-matrix.
  • Compare model data fit of the G-DINA model based on this suggested Q-matrix and the original Q-matrix.