The goal of dcmdata is to provide easy access to data sets for use with diagnostic classification models.
You can install the released version of dcmdata from CRAN with:
install.packages("dcmdata")And the development version from GitHub with:
# install.packages("pak")
pak::pak("r-dcm/dcmdata")dcmdata contains both real and simulated data sets for educational and psychological assessment. For more information on each data set, see the linked reference pages.
- ECPE: Assessment data from the Examination for the Certificate of Proficiency in English, as described in Templin and Hoffman (2013).
- Fraction: The fraction subtraction data described by Tatsuoka (2002).
- MCMI: Psychological assessment data from the Millon Clinical Multiaxial Inventory-III, as described in Rossi et al. (2010).
- MDM: A short integer multiplication assessment, as described in MacReady and Dayton (1977).
- PIE: Assessment data from the Pathways for Instructionally Embedded Assessment data, as described by ATLAS (2025).
- ROAR-PA: Data from the Rapid Online Assessment of Reading and Phonological Awareness, as described by Gijbels et al. (2024).
- TIMSS-03: Data from the 2003 grade 8 Trends in International Mathematics and Science Study, as describe by Skaggs et al. (2016).
- TIMSS-07: Data from the 2007 grade 4 Trends in International Mathematics and Science Study, as describe by Park et al. (2011).
- DTMR: A data set based on the Diagnostic Teachers’ Multiplicative Reasoning assessment, described in Bradshaw et al. (2014).
Contributions are welcome. To ensure a smooth process, please review the Contributing Guide. Please note that the dcmdata project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.