gaussian_traceline_pts

internal

Performs regularization of differential item functioning (DIF) parameters
in item response theory (IRT) models (Belzak & Bauer, 2020)
<https://pubmed.ncbi.nlm.nih.gov/31916799/> using a penalized expectation-maximization
algorithm.

William Belzak

regDIF

Regularized Differential Item Functioning

gaussian_traceline_pts function

<dl><dt>p_item</dt>
<dd>Vector of item parameters.</dd>
<dt>theta</dt>
<dd>Vector of theta values.</dd>
<dt>responses_item</dt>
<dd>Vector of item responses.</dd>
<dt>pred_data</dt>
<dd>Matrix or data frame of DIF and/or impact predictors.</dd>
<dt>samp_size</dt>
<dd>Sample size in data set.</dd></dl>

Arguments

Continuous tracelines. — gaussian_traceline_pts

<dl>

<dt>p_item</dt>
<dd>Vector of item parameters.</dd>


<dt>theta</dt>
<dd>Vector of theta values.</dd>


<dt>responses_item</dt>
<dd>Vector of item responses.</dd>


<dt>pred_data</dt>
<dd>Matrix or data frame of DIF and/or impact predictors.</dd>


<dt>samp_size</dt>
<dd>Sample size in data set.</dd>

</dl>

gaussian_traceline_pts: Continuous tracelines.

Description

Usage

Value

Arguments