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A semiparametric approach to mixed outcome latent variable models: estimating the association between cognition and regional brain volumes. (English) Zbl 1283.62218

Summary: Multivariate data that combine binary, categorical, count and continuous outcomes are common in the social and health sciences. We propose a semiparametric Bayesian latent variable model for multivariate data of arbitrary type that does not require specification of conditional distributions. Drawing on the extended rank likelihood method of P.D. Hof [ibid 1, No. 1, 265–283 (2007; Zbl 1129.62050)], we develop a semiparametric approach for latent variable modeling with mixed outcomes and propose associated Markov chain Monte Carlo estimation methods. Motivated by cognitive testing data, we focus on bifactor models, a special case of factor analysis. We employ our semiparametric Bayesian latent variable model to investigate the association between cognitive outcomes and MRI-measured regional brain volumes.

MSC:

62P10 Applications of statistics to biology and medical sciences; meta analysis
62H12 Estimation in multivariate analysis
92C20 Neural biology
62G05 Nonparametric estimation
62F15 Bayesian inference
62H25 Factor analysis and principal components; correspondence analysis
65C40 Numerical analysis or methods applied to Markov chains

Citations:

Zbl 1129.62050

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References:

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