The intervalpsych package provides a toolbox for the analysis of interval responses in psychometrics and similar disciplines. Interval responses can be used to represent uncertainty or variability in responses to survey items, for example. Besides transformation and plotting function, the package also contains a wrapper to estimate the Interval Consensus Model (ICM; Kloft, Siepe & Heck, 2024) in the probabilistic programming language Stan. Results of the model can be visualized and summarized using the functions provided in the package.
Installation
You can install the released version of intervalpsych from CRAN with:
install.packages("intervalpsych")You can install the latest development version of intervalpsych from GitHub with:
# install.packages("devtools")
devtools::install_github("matthiaskloft/intervalpsych")