DFIT

1.1

Differential Functioning of Items and Tests

0packages depend

4Kdownloads / year

–test coverage

11/13checks pass

Overview

About

Maintained by Victor H. CervantesFirst published 2014-05-205 releasesCRAN page ↗

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).

Install

R (CRAN)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("DFIT", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-dfit

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-DFIT

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-DFIT

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

2NOTE11OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 3.7 min · r-devel-linux-x86_64-fedora-clang

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-05-02
11 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-25
9 OK · 2 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 90%
Return-value docs: 100%
References docs: 64%

Downloads

CRAN downloads in the past year

Rank #11,460 · ~11/day · ~333/mo

Releases R versions

Daily download trend is not available in this view yet.

23830 days

88690 days

4K1 year

Compare downloads with other packages →

Also on125 r2u71 c2d4u

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (5)

msm mirt simex mvtnorm ggplot2

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (0)

Author records are not tracked yet for this package.

Listed in earlier versions (3)

Victor H. Cervantes <vcervantes@icfes.gov.co

no longer listed · 1.0 to 1.0-2

vhcervantesb@unal.edu.co>

no longer listed · 1.0 to 1.0-2

Victor H. Cervantes

no longer listed · 1.0-3 to 1.1

Package Timeline

5 releases. Pick two to compare their code metrics. R releases are shown for context.

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R 4.6.0 released · 2026-04-24
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R 4.5.0 released · 2025-04-11
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R 4.4.0 released · 2024-04-24
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R 4.3.0 released · 2023-04-21
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R 4.2.0 released · 2022-04-22
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2021-08-17 · current release · diff ↗
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R 4.1.0 released · 2021-05-18
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R 4.0.0 released · 2020-04-24
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R 3.6.0 released · 2019-04-26
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R 3.5.0 released · 2018-04-23
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R 3.4.0 released · 2017-04-21
1.0-3
2017-01-06 · diff ↗
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R 3.3.0 released · 2016-05-03
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R 3.2.0 released · 2015-04-16
1.0-2
2015-02-01 · diff ↗
1.0-1
2014-07-15 · diff ↗

Show 2 earlier events

1.0
2014-05-20
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R 3.1.0 released · 2014-04-10

Package metadata

First published: 2014-05-20
Total releases: 5 / 12 yrs
License: GPL (>= 2) OSI
Bundled data: 0.7 KB / 2 files
Download size: 43 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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Psychometric Models and Methods

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