Latent class analysis is used to perform model based clustering for multivariate categorical responses. Selection of the variables most relevant for clustering is an important task which can affect the quality of clustering considerably. This work considers a Bayesian approach for selecting the number of clusters and the best clustering variables. The main idea is to reformulate the problem of group and variable selection as a probabilistically driven search over a large discrete space using Markov chain Monte Carlo (MCMC) methods. Both selection tasks are carried out simultaneously using an MCMC approach based on a collapsed Gibbs sampling method, whereby several model parameters are integrated from the model, substantially improving computational performance. Post-hoc procedures for parameter and uncertainty estimation are outlined. The approach is tested on simulated and real data .
Bayesian variable selection for latent class analysis using a collapsed Gibbs sampler
Arthur J. White,J. Wyse,T. B. Murphy
Published 2014 in Statistics and computing
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- Publication year
2014
- Venue
Statistics and computing
- Publication date
2014-02-27
- Fields of study
Mathematics, Computer Science
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