polytomousItemParameters

<p>This data set contains the item parameters found in Raju, N., Fortmann-Johnson, K., Kim, W., Morris, S.,
Nering, M. &amp; Oshima, T. (2009). The item parameter replication method for detecting differential functioning in the
polytomous DFIT framework. Applied psychological measurement, 33(2), 133--147.</p>

A set of functions to perform Raju, van der Linden and Fleer's
(1995, <doi:10.1177/014662169501900405>) Differential Functioning of Items
and Tests (DFIT) analyses. It includes functions to use the Monte Carlo Item
Parameter Replication approach (Oshima, Raju, & Nanda, 2006, <doi:10.1111/j.1745-3984.2006.00001.x>)
for obtaining the associated statistical significance
tests cut-off points. They may also be used for a priori and post-hoc power
calculations (Cervantes, 2017, <doi:10.18637/jss.v076.i05>).

Victor H Cervantes

DFIT

Differential Functioning of Items and Tests

polytomousItemParameters function

<p>a list with 'focal' and 'reference' elements. Each is a <code>matrix</code> 1 row per item by 5 columns: item discrimination, four item step parameters.</p>

polytomousItemParameters: Sets of focal and reference item parameters from Raju et al. (2009)

Description

Usage

Arguments

Format

References