"ERIC ED619475: Gaussian Variational Estimation For Multidimensional Item Response Theory" - Information and Links:

ERIC ED619475: Gaussian Variational Estimation For Multidimensional Item Response Theory - Info and Reading Options

"ERIC ED619475: Gaussian Variational Estimation For Multidimensional Item Response Theory" and the language of the book is English.


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  • Title: ➤  ERIC ED619475: Gaussian Variational Estimation For Multidimensional Item Response Theory
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  • Language: English

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  • Internet Archive ID: ERIC_ED619475

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Multidimensional Item Response Theory (MIRT) is widely used in assessment and evaluation of educational and psychological tests. It models the individual response patterns by specifying functional relationship between individuals' multiple latent traits and their responses to test items. One major challenge in parameter estimation in MIRT is that the likelihood involves intractable multidimensional integrals due to latent variable structure. Various methods have been proposed that either involve direct numerical approximations to the integrals or Monte Carlo simulations. However, these methods are known to be computationally demanding in high dimensions and rely on sampling data points from a posterior distribution. We propose a new Gaussian Variational EM (GVEM) algorithm which adopts a variational inference to approximate the intractable marginal likelihood by a computationally feasible lower bound. In addition, the proposed algorithm can be applied to assess the dimensionality of the latent traits in an exploratory analysis. Simulation studies are conducted to demonstrate the computational efficiency and estimation precision of the new GVEM algorithm in comparison to the popular alternative Metropolis-Hastings Robbins-Monro (MHRM) algorithm. In addition, theoretical results are also presented to establish the consistency of the estimator from the new GVEM algorithm. [This paper will be published in "British Journal of Mathematical and Statistical Psychology."]

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