手法を比較

	ベイズ的K平均法クラスタリング	潜在クラス分析 (LCA)
分野	統計学	統計学
系統	Latent structure	Latent structure
提唱年	2006–2012	1950s–1968
提唱者	Kulis & Jordan (ICML 2012) formalized the Bayesian nonparametric derivation; Bishop (2006) established the variational Bayesian EM framework for Gaussian mixture models as a probabilistic foundation	Paul F. Lazarsfeld
種類	Probabilistic clustering / Bayesian nonparametric	Latent variable / person-centered classification
原典	Kulis, B. & Jordan, M. I. (2012). Revisiting k-means: New algorithms via Bayesian nonparametrics. In Proceedings of the 29th International Conference on Machine Learning (ICML), Edinburgh, Scotland, pp. 513–520.	Goodman, L. A. (1974). Exploratory latent structure analysis using both identifiable and unidentifiable models. Biometrika, 61(2), 215–231.
別名	Bayesian K-means, probabilistic K-means, Dirichlet K-means, BKM	LCA, latent class model, latent categorical analysis, finite mixture of multinomials
関連	6	6
概要	Bayesian K-means clustering extends the classical K-means algorithm by placing prior distributions over cluster centroids and mixing proportions. This probabilistic framework provides uncertainty estimates for cluster assignments, allows principled model selection for the number of clusters, and regularises centroid estimation — especially valuable when data are scarce or high-dimensional.	Latent class analysis identifies unobserved subgroups — latent classes — within a population by finding patterns of responses across a set of categorical observed indicators. It is the categorical-variable counterpart of cluster analysis, but grounded in an explicit probabilistic model, and is widely used in social, health, and behavioral sciences to discover typologies in survey or diagnostic data.