sim.Q

generate a \(I\) × \(K\) Q-matrix randomly, which consisted of one-attribute q-vectors
(50
This function ensures that the generated Q-matrix contains at least two identity matrices as a priority.
Therefore, this function must also satisfy the condition that the number of items (\(I\)) 
must be at least twice the number of attributes (\(K\)).

Provide a variety of Q-matrix validation methods for the generalized
cognitive diagnosis models, including the method based on the generalized
deterministic input, noisy, and gate model (G-DINA) by de la Torre (2011)
<DOI:10.1007/s11336-011-9207-7> discrimination index (the GDI method) by
de la Torre and Chiu (2016) <DOI:10.1007/s11336-015-9467-8>, the Hull method
by Najera et al. (2021) <DOI:10.1111/bmsp.12228>, the stepwise Wald test method
(the Wald method) by Ma and de la Torre (2020) <DOI:10.1111/bmsp.12156>, the
multiple logistic regression‑based Q‑matrix validation method (the MLR-B method)
by Tu et al. (2022) <DOI:10.3758/s13428-022-01880-x>, the beta method based on
signal detection theory by Li and Chen (2024) <DOI:10.1111/bmsp.12371> and
Q-matrix validation based on relative fit index by Chen et al. (2013)
<DOI:10.1111/j.1745-3984.2012.00185.x>. Different research methods and iterative
procedures during Q-matrix validating are available
<DOI:10.3758/s13428-024-02547-5>.

Haijiang Qin

Qval

The Q-Matrix Validation Methods Framework

Lei Guo

sim.Q function

<dl><dt>K</dt>
<dd>The number of attributes of the Q-matrix.</dd>
<dt>I</dt>
<dd>The number of items.</dd>
<dt>att.str</dt>
<dd>Specify attribute structures. <code>NULL</code>, by default, means there is no structure. Attribute structure 
needs be specified as a list - which will be internally handled by <code>att.structure</code> function. 
See examples. It can also be a matrix giving all permissible attribute profiles.</dd></dl>

Arguments

Haijiang Qin &lt;Haijiang133@outlook.com&gt;

Author

Generate a Random Q-matrix — sim.Q

<dl>

<dt>K</dt>
<dd>The number of attributes of the Q-matrix.</dd>


<dt>I</dt>
<dd>The number of items.</dd>


<dt>att.str</dt>
<dd>Specify attribute structures. <code>NULL</code>, by default, means there is no structure. Attribute structure 
needs be specified as a list - which will be internally handled by <code>att.structure</code> function. 
See examples. It can also be a matrix giving all permissible attribute profiles.</dd>

</dl>

sim.Q: Generate a Random Q-matrix

Description

Usage

Value

Arguments

Author

References

Examples