var,Testlet-method

Calculate the variances of items in a Testlet

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

var,Testlet-method function

<dl><dt>x</dt>
<dd>An <code>Testlet-class</code> object containing the item
parameters of the testlet.</dd>
<dt>y</dt>
<dd>A numeric vector containing the ability parameters (i.e. theta).</dd>
<dt>na.rm</dt>
<dd>Ignored for <code>var(Testlet, ...)</code></dd>
<dt>use</dt>
<dd>Ignored for <code>var(Testlet, ...)</code></dd></dl>

Arguments

Author

Calculate the variances of items in a Testlet — var,Testlet-method

<dl>

<dt>x</dt>
<dd>An <code>Testlet-class</code> object containing the item
parameters of the testlet.</dd>


<dt>y</dt>
<dd>A numeric vector containing the ability parameters (i.e. theta).</dd>


<dt>na.rm</dt>
<dd>Ignored for <code>var(Testlet, ...)</code></dd>


<dt>use</dt>
<dd>Ignored for <code>var(Testlet, ...)</code></dd>

</dl>

var,Testlet-method: Calculate the variances of items in a Testlet

Description

Usage

Value

Arguments

Author