<code>dif</code> evaluates Differential Item Functioning (DIF) of a test.

A collection of Item Response Theory (IRT) and Computerized
Adaptive Testing (CAT) functions that are used in psychometrics.

Emre Gonulates

Item Response Theory and Computerized Adaptive Testing Functions

dif function

<dl><dt>resp</dt>
<dd>A matrix of item responses.</dd>
<dt>group</dt>
<dd>Group membership</dd>
<dt>focal_name</dt>
<dd>In the group variable, the value that represents the focal
group.</dd>
<dt>ip</dt>
<dd>An <code>Itempool-class</code> object.</dd>
<dt>type</dt>
<dd>The type of the DIF method.</dd></dl>

Arguments

Author

Evaluate Differential Item Functioning (DIF) of a test — dif

<dl>

<dt>resp</dt>
<dd>A matrix of item responses.</dd>


<dt>group</dt>
<dd>Group membership</dd>


<dt>focal_name</dt>
<dd>In the group variable, the value that represents the focal
group.</dd>


<dt>ip</dt>
<dd>An <code>Itempool-class</code> object.</dd>


<dt>type</dt>
<dd>The type of the DIF method.</dd>

</dl>

dif: Evaluate Differential Item Functioning (DIF) of a test

Description

Usage

Value

Arguments

Author