High-Performance Open-Source Archive
A collection of common test and item analyses from a classical test theory (CTT) framework. Analyses can be applied to both dichotomous and polytomous data. Functions provide reliability analyses (alpha), item statistics, disctractor analyses, disattenuated correlations, scoring routines, and empirical ICCs.
| Version: | 2.3.4 |
| Published: | 2026-02-10 |
| DOI: | 10.32614/CRAN.package.CTT |
| Author: | John T. Willse [aut, cre] |
| Maintainer: | John T. Willse <measurementjohn at gmail.com> |
| License: | GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] |
| NeedsCompilation: | no |
| In views: | Psychometrics |
| CRAN checks: | CTT results |
| Reference manual: | CTT.html , CTT.pdf |
| Package source: | CTT_2.3.4.tar.gz |
| Windows binaries: | r-devel: CTT_2.3.4.zip, r-release: CTT_2.3.4.zip, r-oldrel: CTT_2.3.4.zip |
| macOS binaries: | r-release (arm64): CTT_2.3.4.tgz, r-oldrel (arm64): CTT_2.3.4.tgz, r-release (x86_64): CTT_2.3.4.tgz, r-oldrel (x86_64): CTT_2.3.4.tgz |
| Old sources: | CTT archive |
| Reverse depends: | subscore |
| Reverse imports: | CTTShiny, CTTvis, IRTShiny, measureR, sphereML |
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