Generic Identifiability of the DINA Model and Blessing of Latent Dependence
Generic Identifiability of the DINA Model and Blessing of Latent Dependence
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DINA 模型的通用可识别性和潜在依赖的祝福
DOI:
10.1007/s11336-022-09886-2
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发表时间:
2022
期刊:
影响因子:
3
通讯作者:
Gu, Yuqi
中科院分区:
文献类型:
--
作者:
Gu, Yuqi
Cognitive diagnostic models are a powerful family of fine-grained discrete latent variable models in psychometrics. Within this family, the DINA model is a fundamental and parsimonious one that has received significant attention. Similar to other complex latent variable models, identifiability is an important issue for CDMs, including the DINA model. Gu and Xu (Psychometrika 84(2):468–483, 2019) established the necessary and sufficient conditions forstrictidentifiability of the DINA model. Despite being the strongest possible notion of identifiability, strict identifiability may impose overly stringent requirements on designing the cognitive diagnostic tests. This work studies a slightly weaker yet very useful notion,genericidentifiability, which means parameters are identifiable almost everywhere in the parameter space, excluding only a negligible subset of measure zero. We propose transparent generic identifiability conditions for the DINA model, relaxing existing conditions in nontrivial ways. Under generic identifiability, we also explicitly characterize the forms of the measure-zero sets where identifiability breaks down. In addition, we reveal an interestingblessing-of-latent-dependencephenomenon under DINA—that is, dependence between the latent attributes can restore identifiability under some otherwise unidentifiable-matrix designs. The blessing of latent dependence provides useful practical implications and reassurance for real-world designs of cognitive diagnostic assessments.
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影响因子:
2.4
作者:
Yamaguchi;K.;Okada;K.
通讯作者:
K.
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
B. Junker;K. Sijtsma
通讯作者:
K. Sijtsma
影响因子:
1.4
作者:
Yuqi Gu;Gongjun Xu
通讯作者:
Yuqi Gu;Gongjun Xu
影响因子:
3
作者:
Gu, Yuqi;Xu, Gongjun
通讯作者:
Xu, Gongjun