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A latent variable model is a statistical model that relates a set of variables (so-called ''manifest variables'') to a set of latent variables. It is assumed that the responses on the indicators or manifest variables are the result of an individual's position on the latent variable(s), and that the manifest variables have nothing in common after controlling for the latent variable (local independence). Different types of the latent variable model can be grouped according to whether the manifest and latent variables are categorical or continuous: 〔David J. Bartholomew, Fiona Steel, Irini Moustaki, Jane I. Galbraith (2002), ''The Analysis and Interpretation of Multivariate Data for Social Scientists'', Chapman & Hall/CRC, p. 145〕 The Rasch model represents the simplest form of item response theory. Mixture models are central to latent profile analysis. In factor analysis and latent trait analysis the latent variables are treated as continuous normally distributed variables, and in latent profile analysis and latent class analysis as from a multinomial distribution. The manifest variables in factor analysis and latent profile analysis are continuous and in most cases, their conditional distribution given the latent variables is assumed to be normal. In latent trait analysis and latent class analysis, the manifest variables are discrete. These variables could be dichotomous, ordinal or nominal variables. Their conditional distributions are assumed to be binomial or multinomial. Because the distribution of a continuous latent variable can be approximated by a discrete distribution, the distinction between continuous and discrete variables turns out not to be fundamental at all. Therefore there may be a psychometrical latent variable, but not a psychological psychometric variable. ==See also== * Partial least squares path modeling * Partial least squares regression * Structural equation modeling 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Latent variable model」の詳細全文を読む スポンサード リンク
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