missalpha

0.2.0

Find Range of Cronbach Alpha with a Dataset Including Missing Data

0packages depend

2.3Kdownloads / year

81.6%test coverage

13/13checks pass

Overview

About

Maintained by Biying ZhouFirst published 2025-09-092 releasesCRAN page ↗

Provides functions to calculate the minimum and maximum possible values of Cronbach's alpha when item-level missing data are present. Cronbach's alpha (Cronbach, 1951 doi:10.1007/BF02310555) is one of the most widely used measures of internal consistency in the social, behavioral, and medical sciences (Bland & Altman, 1997 doi:10.1136/bmj.314.7080.572; Tavakol & Dennick, 2011 doi:10.5116/ijme.4dfb.8dfd). However, conventional implementations assume complete data, and listwise deletion is often applied when missingness occurs, which can lead to biased or overly optimistic reliability estimates (Enders, 2003 doi:10.1037/1082-989X.8.3.322). This package implements computational strategies including enumeration, Monte Carlo sampling, and optimization algorithms (e.g., Genetic Algorithm, Differential Evolution, Sequential Least Squares Programming) to obtain sharp lower and upper bounds of Cronbach's alpha under arbitrary missing data patterns. The approach is motivated by Manski's partial identification framework and pessimistic bounding ideas from optimization literature.

Install

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

install.packages("missalpha", 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-missalpha

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-missalpha

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-missalpha

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

Health

CRAN checks

13OK

Slowest check: 8.1 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.23

81.6%

Coverage · measured lines

100%

Documentation · exports

None

Vignettes

README

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Downloads

2.3K

CRAN downloads in the past year

Rank #22,990 · ~6/day · ~193/mo

Releases R versions

Daily download trend is not available in this view yet.

19430 days

49690 days

2.3K1 year

Compare downloads with other packages →

Also on63 r2u13 autocran

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.1.0

Imports (4)

GA DEoptim nloptrstats

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 1,532 (69%)Rd 677 (31%)

Code characteristics

Object systems

S32

Cyclomatic complexity: 3.0 median / 8 max
Test cases: 1 / 0.23 per code line
Documented parameters: 100%

Test coverage

Line coverage

82%

Expression

81.2%

Tests / Examples

81.6% / 2% ex

Functions

22 12 exported

Complexity

3.5 avg / 8 max

Call network

22 nodes / 20 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

22 functions

Function	Cyclo	Coverage
cronbach_alpha_enum exp	8	0%
summary.CronbachAlphaResult	7	60%
cronbachs_alpha exp	3	77%
display_all exp	4	79%
cronbach_alpha_rough exp	6	84%
qp_solver_DEoptim exp	2	87%

People & History

People (2)

Maintainer (1)

Biying Zhou

Author, Maintainer

Authors (2)

Biying Zhou

Author, Maintainer

Feng Ji

Author

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
0.2.0Latest
2025-10-29 · current release · diff ↗
0.1.0
2025-09-09
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2025-09-09
Total releases: 2 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.1.0
Bundled data: 0.7 KB / 2 files
Download size: 19 KB
Installed size: not tracked yet
With dependencies: not tracked yet