conquestr: An R Package to Extend 'ACER ConQuest'

Extends 'ACER ConQuest' through a family of functions designed to improve graphical outputs and help with advanced analysis (e.g., differential item functioning). Allows R users to call 'ACER ConQuest' from within R and read 'ACER ConQuest' System Files (generated by the command 'put'). Requires 'ACER ConQuest' version 5.19.5 or later. A demonstration version can be downloaded from <>.

Version: 0.9.96
Imports: dplyr, ggplot2 (≥ 3.3.0), ggrepel, kableExtra, magrittr, methods, Rcpp, rlang, stats, stringr, tidyr, tidyselect
LinkingTo: Rcpp
Suggests: knitr, rmarkdown, testthat (≥ 3.0.0)
Published: 2022-04-01
Author: Dan Cloney ORCID iD [aut, cre], Ray Adams [aut]
Maintainer: Dan Cloney <dan.cloney at>
License: GPL-3
NeedsCompilation: yes
SystemRequirements: ACER ConQuest (>=5.19.5)
Materials: README NEWS
In views: Psychometrics
CRAN checks: conquestr results


Reference manual: conquestr.pdf
Vignettes: Data cleaning function in conquestr
Introduction to conquestr
Item analysis tables in conquestr
Plotting in conquestr
Probability of response vectors in conquestr
Item Review Sheets produced using conquestr


Package source: conquestr_0.9.96.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): conquestr_0.8.5.tgz, r-release (x86_64): conquestr_0.9.96.tgz, r-oldrel: conquestr_0.9.96.tgz
Old sources: conquestr archive


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