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Hybrid cognitive diagnostic model

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Abstract

Cognitive diagnostic models can be classified into two categories based on the type of interaction between attributes: disjunctive and conjunctive. A representative example of the former is the “Deterministic Input Noisy-Or gate” (DINO) model, and of the latter is the “Deterministic Input Noisy-And gate” (DINA) model. However, fixing the interaction form to be either disjunctive or conjunctive may be based on a strong assumption. Therefore, we developed a new hybrid cognitive diagnostic model in which the item response function is represented as a weighted mixture of disjunctive and conjunctive item response functions. This made it possible to estimate the quantitative degree of each interaction type for each item, while keeping the parameters within reasonable limits. The proposed model was formalized as a Bayesian model and estimated using the Hamiltonian Monte Carlo algorithm. A Monte Carlo simulation confirmed adequate parameter recovery of the proposed method. In an empirical application to actual mathematics test data, the proposed model achieved better predictive performance than the DINA and DINO models. The obtained posteriors of the mixture weights were found to be heterogeneous among items, indicating key advantages of the proposed approach.

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Notes

  1. The dataset is available at the TIMSS website (https://timssandpirls.bc.edu/TIMSS2007/idb_ug.html) together with the item information (https://timssandpirls.bc.edu/TIMSS2007/PDF/T07_Items.zip).

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Funding

This work was supported by JSPS Grant-in-Aid for JSPS Research Fellow 18J01312 and JSPS KAKANHI 17H04787, 19H00616.

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Correspondence to Kazuhiro Yamaguchi.

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We have no conflicts of interest to declare.

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Communicated by Wim J. van der Linden.

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Appendix

Appendix

Data analysis code is available in Supplementary Material (https://osf.io/z53mw/).

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Yamaguchi, K., Okada, K. Hybrid cognitive diagnostic model. Behaviormetrika 47, 497–518 (2020). https://doi.org/10.1007/s41237-020-00111-x

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  • DOI: https://doi.org/10.1007/s41237-020-00111-x

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