var,Testlet-method {irt}

Calculate the variances of items in a Testlet

Description

Calculate the variances of items in a Testlet

Usage

## S4 method for signature 'Testlet'
var(x, y = NULL, na.rm = FALSE, use)

Arguments

x

An Testlet-class object containing the item parameters of the testlet.

y

A numeric vector containing the ability parameters (i.e. theta).

na.rm

Ignored for var(Testlet, ...)

use

Ignored for var(Testlet, ...)

Value

Item variances at given theta will be returned.

Author(s)

Emre Gonulates