DFIT: Differential Functioning of Items and Tests

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).

AuthorVictor H. Cervantes <vhcervantesb@unal.edu.co>
Date of publication2017-01-06 01:20:43
MaintainerVictor H. Cervantes <vhcervantesb@unal.edu.co>
LicenseGPL (>= 2)
Version1.0-3

View on CRAN

Man pages

Ase1pl: Calculates the asymptotic variance for difficulty parameter...

Ase2pl: Calculates the asymptotic covariance matrix of item parameter...

Ase3pl: Calculates the asymptotic covariance matrix of item parameter...

AseIrt: Calculates the asymptotic covariance matrices for item...

Bound3PlIpr: Takes item parameters frp, Ipr and forces guessing to lie...

Calculate1plProb: Calculates the item success probability under the 1PL model.

Calculate2plProb: Calculates the item success probability under the 2PL model.

Calculate3plProb: Calculates the item success probability under the 3PL model.

CalculateGrmExp: Calculates the expected item score under the GRM model.

CalculateItemDifferences: Calculates the differences between two item option...

CalculatePcmExp: Calculates the expected item score under the (G)PCM model.

Cdif: Calculates CDIF index for an item with given item parameters...

CrossedProbabilities: Calculates the crossed probabilities associated with the...

CutoffIpr: Cut-off points for Ipr generated estimates

DeltaMhIrt: Obtains the ETS Delta measure for Mantel-Haneszel DIF...

DFIT: Differential Functioning of Items and Tests framework

dichotomousItemParameters: Sets of focal and reference item parameters from Wright...

Dtf: Calculates DTF index for a set of items with given item...

Ipr: Item parameter replication

IprMh: Mantel Haenszel for Item parameter replication

IprNcdif: NCDIF for Item parameter replication

IprSam: Signed Area Measure for Item parameter replication

IprUam: Unsigned Area Measure for Item parameter replication

IrtMh: Calculates the Mantel-Haenszel theoretical parameter when a...

Ncdif: Calculates NCDIF index for an item with given item parameters...

PlotNcdif: Plot the item characteristic (expected score) curve for focal...

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

ProductProbabilities: Calculates the product of item response probabilities for...

SignedArea: Calculates Raju's Signed Area Measure index for an item with...

UnsignedArea: Calculates Raju's Unsigned Area Measure index for an item...

Functions

Ase1pl Man page
Ase2pl Man page
Ase3pl Man page
AseIrt Man page
Bound3PlIpr Man page
Calculate1plProb Man page
Calculate2plProb Man page
Calculate3plProb Man page
CalculateGrmExp Man page
CalculateItemDifferences Man page
CalculatePcmExp Man page
Cdif Man page
CrossedProbabilities Man page
CutoffIpr Man page
DeltaMhIrt Man page
DFIT Man page
DFIT-package Man page
dichotomousItemParameters Man page
Dtf Man page
Ipr Man page
IprMh Man page
IprNcdif Man page
IprSam Man page
IprUam Man page
IrtMh Man page
Ncdif Man page
PlotNcdif Man page
polytomousItemParameters Man page
ProductProbabilities Man page
SignedArea Man page
UnsignedArea Man page

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