TSQCA: Threshold Sweep Extensions for Qualitative Comparative Analysis

Provides threshold sweep methods for Qualitative Comparative Analysis (QCA). Implements Condition Threshold Sweep-Single (CTS-S), Condition Threshold Sweep-Multiple (CTS-M), Outcome Threshold Sweep (OTS), and Dual Threshold Sweep (DTS) for systematic exploration of threshold calibration effects on crisp-set QCA results. These methods extend traditional robustness approaches by treating threshold variation as an exploratory tool for discovering causal structures. Also provides Fiss (2011) <doi:10.5465/amj.2011.60263120> core/peripheral condition classification via compute_fiss_core() and generate_fiss_chart(), enabling four-symbol configuration charts that distinguish core conditions (present in both parsimonious and intermediate solutions) from peripheral conditions (intermediate only). Built on top of the 'QCA' package by Dusa (2019) <doi:10.1007/978-3-319-75668-4>, with function arguments following 'QCA' conventions. Based on set-theoretic methods by Ragin (2008) <doi:10.7208/chicago/9780226702797.001.0001> and established robustness protocols by Rubinson et al. (2019) <doi:10.1177/00491241211036158>.

Version: 1.3.2
Depends: R (≥ 4.0)
Imports: QCA
Suggests: knitr, rmarkdown, testthat (≥ 3.0.0)
Published: 2026-03-14
DOI: 10.32614/CRAN.package.TSQCA
Author: Yuki Toyoda [aut, cre], Japan Society for the Promotion of Science [fnd] (KAKENHI Grant Number JP20K01998)
Maintainer: Yuki Toyoda <yuki.toyoda.ds at hosei.ac.jp>
BugReports: https://github.com/im-research-yt/TSQCA/issues
License: MIT + file LICENSE
URL: https://github.com/im-research-yt/TSQCA, https://doi.org/10.5281/zenodo.17899390
NeedsCompilation: no
Citation: TSQCA citation info
Materials: README, NEWS
CRAN checks: TSQCA results

Documentation:

Reference manual: TSQCA.html , TSQCA.pdf
Vignettes: TSQCA Reproducible Code (English) (source, R code)
TSQCA Tutorial (English) (source, R code)

Downloads:

Package source: TSQCA_1.3.2.tar.gz
Windows binaries: r-devel: TSQCA_1.3.1.zip, r-release: TSQCA_1.3.1.zip, r-oldrel: TSQCA_1.3.1.zip
macOS binaries: r-release (arm64): TSQCA_1.3.1.tgz, r-oldrel (arm64): TSQCA_1.3.2.tgz, r-release (x86_64): TSQCA_1.3.1.tgz, r-oldrel (x86_64): TSQCA_1.3.1.tgz
Old sources: TSQCA archive

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