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 Documentation: Downloads: Linking:Please use the canonical form https://CRAN.R-project.org/package=intervalpsych to link to this page.
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