dif {irt}

Evaluate Differential Item Functioning (DIF) of a test

Description

dif evaluates Differential Item Functioning (DIF) of a test.

Usage

dif(resp, group, focal_name, ip = NULL, type = "mh")

Arguments

resp

A matrix of item responses.

group

Group membership

focal_name

In the group variable, the value that represents the focal group.

ip

An Itempool-class object.

type

The type of the DIF method.

Value

A data.frame of DIF values.

Author(s)

Emre Gonulates