coef.regDIF

Coefficient function for regDIF function

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

coef.regDIF function

<dl><dt>object</dt>
<dd>Fitted regDIF model object.</dd>
<dt>tau</dt>
<dd>Optional character or numeric indicating the tau(s) at
which the model coefficients are returned. For character value, may be
<code>"tau.min"</code>, which returns model coefficients for the value of tau
at which the minimum fit statistic is identified. For numeric, the value(s)
provided corresponds to the value(s) of tau.</dd>
<dt>method</dt>
<dd>Character value indicating the model fit statistic to be used
for determining <code>"tau.min"</code>. Default is <code>"bic"</code>. May also be
<code>"aic"</code>.</dd>
<dt>...</dt>
<dd>Additional arguments to be passed through to <code>coef</code>.</dd></dl>

Arguments

Coefficient function for regDIF function — coef.regDIF

<dl>

<dt>object</dt>
<dd>Fitted regDIF model object.</dd>


<dt>tau</dt>
<dd>Optional character or numeric indicating the tau(s) at
which the model coefficients are returned. For character value, may be
<code>"tau.min"</code>, which returns model coefficients for the value of tau
at which the minimum fit statistic is identified. For numeric, the value(s)
provided corresponds to the value(s) of tau.</dd>


<dt>method</dt>
<dd>Character value indicating the model fit statistic to be used
for determining <code>"tau.min"</code>. Default is <code>"bic"</code>. May also be
<code>"aic"</code>.</dd>


<dt>...</dt>
<dd>Additional arguments to be passed through to <code>coef</code>.</dd>

</dl>

coef.regDIF: Coefficient function for regDIF function

Description

Usage

Value

Arguments