Implements the Interval Consensus Model (ICM) for analyzing continuous bounded interval-valued responses in psychometrics using 'Stan' for 'Bayesian' estimation. Provides functions for transforming interval data to simplex representations, fitting item response theory (IRT) models with isometric log-ratio (ILR) and sum log-ratio (SLR) link functions, and visualizing results. The package enables aggregation and analysis of interval-valued response data commonly found in psychological measurement and related disciplines. Based on Kloft et al. (2024) <doi:10.31234/osf.io/dzvw2>.
| Version: | 0.1.0 |
| Depends: | R (≥ 4.1) |
| Imports: | dplyr,ggdist,ggokabeito,ggplot2, methods,posterior,purrr,Rcpp (≥ 0.12.0),RcppParallel (≥ 5.0.1),rstan (≥ 2.18.1),rstantools (≥ 2.4) |
| 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: | 2025-07-08 |
| DOI: | 10.32614/CRAN.package.intervalpsych |
| Author: | Matthias Kloft [aut, cre, cph], Björn S. Siepe [aut] |
| Maintainer: | Matthias Kloft <kloft.dev+intervalpsych at gmail.com> |
| BugReports: | https://github.com/matthiaskloft/intervalpsych/issues |
| License: | GPL (≥ 3) |
| URL: | https://matthiaskloft.github.io/intervalpsych/,https://github.com/matthiaskloft/intervalpsych |
| NeedsCompilation: | yes |
| SystemRequirements: | GNU make |
| Materials: | README,NEWS |
| CRAN checks: | intervalpsych results |