Changes in version 1.2.0 (2025-08-30) - Second revision. - Added a vignette to the package. - Included a dataset on student achievement (ddk_2011). Changes in version 1.1.0 (2024-08-29) - First revision. - Added summary.qte() and several print methods. - Added p-values in the outcome of rdq.test(). Changes in version 1.0.0 (2024-03-18) - Initial CRAN submission.