Dynamic Latent Trait Models for Multidimensional Longitudinal Data
多维纵向数据的动态潜在特质模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确分析同一个体随时间重复测量的数据,并以既往潜在特质解释当前特质,直接涉及纵向数据建模。
多维纵向数据的动态潜在特质模型AI 解读 ↓
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This article presents a new approach for analysis of multidimensional longitudinal data, motivated by studies using an item response battery to measure traits of an individual repeatedly over time. A general modeling framework is proposed that allows mixtures of count, categorical, and continuous response variables. Each response is related to age-specific latent traits through a generalized linear model that accommodates item-specific measurement errors. A transition model allows the latent traits at a given age to depend on observed predictors and on previous latent traits for that individual. Following a Bayesian approach to inference, a Markov chain Monte Carlo algorithm is proposed for posterior computation. The methods are applied to data from a neurotoxicity study of the pesticide methoxychlor, and evidence of a dose-dependent increase in motor activity is presented.