var,Itempool-method

<code>var</code> Returns the variance of each item of an
 <code>Itempool-class</code> object for a given ability or abilities,
 i.e. \(\theta\).

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,Itempool-method function

<dl><dt>x</dt>
<dd>An <code>Itempool-class</code> object containing the item
parameters.</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(Itempool, ...)</code></dd>
<dt>use</dt>
<dd>Ignored for <code>var(Itempool, ...)</code></dd></dl>

Arguments

Author

Calculate the variances of items in an Itempool — var,Itempool-method

<dl>

<dt>x</dt>
<dd>An <code>Itempool-class</code> object containing the item
parameters.</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(Itempool, ...)</code></dd>


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

</dl>

var,Itempool-method: Calculate the variances of items in an Itempool

Description

Usage

Value

Arguments

Author