
The purpose of this study is to develop and evaluate two diagnostic classification models (DCMs) for scoring ordinal item data. We first applied the proposed models to an operational dataset and compared their performance to an epitome of current polytomous DCMs in which the ordered data structure is ignored. Findings suggest that the much more parsimonious models that we proposed performed similarly to the current polytomous DCMs and offered useful item-level information in addition to option-level information. We then performed a small simulation study using the applied study condition and demonstrated that the proposed models can provide unbiased parameter estimates and correctly classify individuals. In practice, the proposed models can accommodate much smaller sample sizes than current polytomous DCMs and thus prove useful in many small-scale testing scenarios.
Markov Chain Monte Carlo (MCMC), Biomedical and clinical sciences, 330, Biomedical and Clinical Sciences, partial credit model, diagnostic classification model, Bayesian estimation, rating scales, ordinal item responses, BF1-990, Psychology, Cognitive Sciences, Markov Chain Monte Carlo
Markov Chain Monte Carlo (MCMC), Biomedical and clinical sciences, 330, Biomedical and Clinical Sciences, partial credit model, diagnostic classification model, Bayesian estimation, rating scales, ordinal item responses, BF1-990, Psychology, Cognitive Sciences, Markov Chain Monte Carlo
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