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intervalpsych  

Analyzing Interval Data in Psychometrics
View on CRAN: Click here


Download and install intervalpsych package within the R console
Install from CRAN:
install.packages("intervalpsych")

Install from Github:
library("remotes")
install_github("cran/intervalpsych")

Install by package version:
library("remotes")
install_version("intervalpsych", "0.1.0")



Attach the package and use:
library("intervalpsych")
Maintained by
Matthias Kloft
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2025-07-08
Latest Update: 2025-07-08
Description:
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>.
How to cite:
Matthias Kloft (2025). intervalpsych: Analyzing Interval Data in Psychometrics. R package version 0.1.0, https://cran.r-project.org/web/packages/intervalpsych. Accessed 25 Oct. 2026.
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