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Formulating mixed models for experiments, including longitudinal experiments

机译:为实验(包括纵向实验)制定混合模型

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The proposed method retains the principle that the model used should include, at least, all the terms justified by the randomization. This is done by dividing the factors into sets, called tiers, based on the randomization and determining the crossing and nesting relationships between factors. The method is applied to formulate mixed models for a wide range of examples. The analysis is described for a three phase experiment on the effect of time of refinement of eucalyptus pulp from 4 sources. Cubic splines are used to describe trend differences over time and unstructured covariance matrices between times are found to be necessary. (32 refs.)
机译:所提出的方法保留了以下原则:所使用的模型应至少包括随机化证明的所有术语。这是通过基于随机化将因子划分为称为层的集合并确定因子之间的交叉和嵌套关系来完成的。该方法适用于为各种示例制定混合模型。针对三相实验对4种来源的桉木浆精制时间的影响进行了分析。三次样条用于描述随时间的趋势差异,并且发现时间之间的非结构化协方差矩阵是必要的。 (32参考)

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