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Bounded continuous data are encountered in many areas of test application. Examples include visual analogue scales used in the measurement of personality, mood, depression, and quality of life; item response times from tests with item deadlines; confidence ratings; and pain intensity ratings. Using this package, item response theory (IRT) models suitable for bounded continuous item scores can be fitted to data within a Bayesian framework. The package draws on posterior sampling facilities provided by R-package 'rstan' (Stan Development Team, 2025)<https://mc-stan.org/>. Available models include the Beta IRT model by Noel and Dauvier (2007)<doi:10.1177/0146621605287691>, the continuous response model by Samejima (1973)<doi:10.1007/BF03372160>, the unbounded normal model by Mellenbergh (1994)<doi:10.1207/s15327906mbr2903_2>, and the Simplex IRT model by Flores et al. (2020)<doi:10.1007/978-3-030-43469-4_8>. All models can be fitted with or without zero-one inflation (Molenaar et al., 2022)<doi:10.3102/10769986221108455>. Model fit comparisons can be conducted using the Watanabe–Akaike information criterion (WAIC), the deviance information criterion (DIC), and the fully marginalized likelihood (i.e., Bayes factors).
| Version: | 0.0.1 |
| Depends: | R (≥ 3.5) |
| Imports: | methods, mvtnorm, rmutil, MASS, Rcpp (≥ 0.12.0), RcppParallel (≥ 5.0.1), rstan (≥ 2.18.1), rstantools (≥ 2.6.0) |
| LinkingTo: | BH (≥ 1.66.0), Rcpp (≥ 0.12.0), RcppEigen (≥ 0.3.3.3.0), RcppParallel (≥ 5.0.1), rstan (≥ 2.18.1), StanHeaders (≥ 2.18.0) |
| Suggests: | testthat (≥ 3.0.0) |
| Published: | 2026-04-20 |
| DOI: | 10.32614/CRAN.package.BoundIRT (may not be active yet) |
| Author: | Dylan Molenaar [aut, cre] |
| Maintainer: | Dylan Molenaar <d.molenaar at uva.nl> |
| License: | GPL-3 |
| NeedsCompilation: | yes |
| SystemRequirements: | GNU make |
| CRAN checks: | BoundIRT results |
| Reference manual: | BoundIRT.html , BoundIRT.pdf |
| Package source: | BoundIRT_0.0.1.tar.gz |
| Windows binaries: | r-devel: BoundIRT_0.0.1.zip, r-release: not available, r-oldrel: not available |
| macOS binaries: | r-release (arm64): BoundIRT_0.0.1.tgz, r-oldrel (arm64): not available, r-release (x86_64): BoundIRT_0.0.1.tgz, r-oldrel (x86_64): BoundIRT_0.0.1.tgz |
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