# dcmdata The goal of dcmdata is to provide easy access to data sets for use with diagnostic classification models. ## Installation You can install the released version of dcmdata from [CRAN](https://cran.r-project.org/) with: ``` r install.packages("dcmdata") ``` And the development version from [GitHub](https://github.com/) with: ``` r # install.packages("pak") pak::pak("r-dcm/dcmdata") ``` ## About the data 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. ### Real data sets - [ECPE](https://dcmdata.r-dcm.org/reference/ecpe.html): Assessment data from the Examination for the Certificate of Proficiency in English, as described in [Templin and Hoffman (2013)](https://doi.org/10.1111/emip.12010). - [Fraction](https://dcmdata.r-dcm.org/reference/fraction.html): The fraction subtraction data described by [Tatsuoka (2002)](https://doi.org/10.1111/1467-9876.00272). - [MCMI](https://dcmdata.r-dcm.org/reference/mcmi.html): Psychological assessment data from the Millon Clinical Multiaxial Inventory-III, as described in [Rossi et al. (2010)](https://doi.org/10.1521/pedi.2010.24.1.128). - [MDM](https://dcmdata.r-dcm.org/reference/mdm.html): A short integer multiplication assessment, as described in [MacReady and Dayton (1977)](https://doi.org/10.2307/1164802). - [PIE](https://dcmdata.r-dcm.org/reference/pie.html): Assessment data from the Pathways for Instructionally Embedded Assessment data, as described by [ATLAS (2025)](https://pie.atlas4learning.org/sites/default/files/documents/resources/PIE_Pilot_Study_Design_and_Administration_Evidence.pdf). - [ROAR-PA](https://dcmdata.r-dcm.org/reference/roarpa.html): Data from the Rapid Online Assessment of Reading and Phonological Awareness, as described by [Gijbels et al. (2024)](https://doi.org/10.1038/s41598-024-60834-9). - [TIMSS-03](https://dcmdata.r-dcm.org/reference/timss03.html): Data from the 2003 grade 8 Trends in International Mathematics and Science Study, as describe by [Skaggs et al. (2016)](https://doi.org/10.1080/15305058.2016.1145683). - [TIMSS-07](https://dcmdata.r-dcm.org/reference/timss07.html): Data from the 2007 grade 4 Trends in International Mathematics and Science Study, as describe by [Park et al. (2011)](https://doi.org/10.1080/15305058.2010.534571). ### Simulated data sets - [DTMR](https://dcmdata.r-dcm.org/reference/dtmr.html): A data set based on the Diagnostic Teachers’ Multiplicative Reasoning assessment, described in [Bradshaw et al. (2014)](https://doi.org/10.1111/emip.12020). ------------------------------------------------------------------------ ## Contributions and Code of Conduct Contributions are welcome. To ensure a smooth process, please review the [Contributing Guide](https://dcmdata.r-dcm.org/CONTRIBUTING.html). Please note that the dcmdata project is released with a [Contributor Code of Conduct](https://dcmdata.r-dcm.org/CODE_OF_CONDUCT.html). By contributing to this project, you agree to abide by its terms. # Package index ## Real data sets - [`ecpe_data`](https://dcmdata.r-dcm.org/reference/ecpe.md) [`ecpe_qmatrix`](https://dcmdata.r-dcm.org/reference/ecpe.md) : Examination for the certificate of proficiency in English (ECPE) - [`fraction_data`](https://dcmdata.r-dcm.org/reference/fraction.md) [`fraction_qmatrix`](https://dcmdata.r-dcm.org/reference/fraction.md) : Tatsuoka fraction subtraction data - [`mdm_data`](https://dcmdata.r-dcm.org/reference/mdm.md) [`mdm_qmatrix`](https://dcmdata.r-dcm.org/reference/mdm.md) : MacReady & Dayton multiplication data (MDM) - [`mcmi_data`](https://dcmdata.r-dcm.org/reference/mcmi.md) [`mcmi_qmatrix`](https://dcmdata.r-dcm.org/reference/mcmi.md) : Millon Clinical Multiaxial Inventory-III (MCMI-III) - [`pie_ft_data`](https://dcmdata.r-dcm.org/reference/pie.md) [`pie_ft_qmatrix`](https://dcmdata.r-dcm.org/reference/pie.md) [`pie_pilot_data`](https://dcmdata.r-dcm.org/reference/pie.md) [`pie_pilot_qmatrix`](https://dcmdata.r-dcm.org/reference/pie.md) : Pathways for instructionally embedded assessment (PIE) - [`roarpa_data`](https://dcmdata.r-dcm.org/reference/roarpa.md) [`roarpa_qmatrix`](https://dcmdata.r-dcm.org/reference/roarpa.md) : Rapid online assessment of reading and phonological awareness (ROAR-PA) - [`timss03_data`](https://dcmdata.r-dcm.org/reference/timss03.md) [`timss03_qmatrix`](https://dcmdata.r-dcm.org/reference/timss03.md) : Trends in international mathematics and science study (TIMSS) assessment for grade 8 mathematics (2003) - [`timss07_data`](https://dcmdata.r-dcm.org/reference/timss07.md) [`timss07_skill_qmatrix`](https://dcmdata.r-dcm.org/reference/timss07.md) [`timss07_topic_qmatrix`](https://dcmdata.r-dcm.org/reference/timss07.md) [`timss07_domain_qmatrix`](https://dcmdata.r-dcm.org/reference/timss07.md) : Trends in international mathematics and science study (TIMSS) assessment for grade 4 mathematics (2007) ## Simulated data sets - [`dtmr_data`](https://dcmdata.r-dcm.org/reference/dtmr.md) [`dtmr_qmatrix`](https://dcmdata.r-dcm.org/reference/dtmr.md) [`dtmr_true_structural`](https://dcmdata.r-dcm.org/reference/dtmr.md) [`dtmr_true_profiles`](https://dcmdata.r-dcm.org/reference/dtmr.md) [`dtmr_true_items`](https://dcmdata.r-dcm.org/reference/dtmr.md) : Diagnosing teachers' multiplicative reasoning (DTMR) ## Tools for simulating data - [`generate_ids()`](https://dcmdata.r-dcm.org/reference/generate_ids.md) : Generate unique identifiers - [`logit()`](https://dcmdata.r-dcm.org/reference/log_odds.md) [`inv_logit()`](https://dcmdata.r-dcm.org/reference/log_odds.md) : Log-odds transformation