User Guide

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Chapter 3
Specify Model. A full factorial model contains all factor main effects, all covariate main
effects, and all factor-by-factor interactions. It does not contain covariate interactions.
Select
Custom to specify only a subset of interactions or to specify factor-by-covariate
interactions. You must indicate all of the terms to be included in the model.
Factors and Covariates. The factors and covariates are listed with (F) for a fixed factor,
(R) for a random factor, and (C) for a covariate.
Model. The model depends on the nature of your data. After selecting Custom, you can
select the main effects and interactions that are of interest in your analysis. The model
must contain a random factor.
Include intercept in model. Usually the intercept is included in the model. If you can
assume that the data pass through the origin, you can exclude the intercept.
Build Terms
For the selected factors and covariates:
Interaction. Creates the highest-level interaction term of all selected variables. This is
the default.
Main effects. Creates a main-effects term for each variable selected.
All 2-way. Creates all possible two-way interactions of the selected variables.
All 3-way. Creates all possible three-way interactions of the selected variables.
All 4-way. Creates all possible four-way interactions of the selected variables.
All 5-way. Creates all possible five-way interactions of the selected variables.