Use the text field to specify effects by which to model the mean of the response variables.
These fixed effectsare in addition to the primary time and/or treatment effects, so do not specify any effects confounded with those. The effects can include any mixture of class variables (as specified in the Cluster Center Variable above) or continuous covariates.
To Specify Additional Fixed Effects:
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Type one or more fixed effects in the text field.
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If you specify more than one fixed effect that you must separate the effects with spaces. For example, assuming A and B are listed as Cluster Center Variable, typing A B in the text field specifies variables A and B as main fixed effects.
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To specify interactions between effect, type an asterisk (*) between the effects. For example, assuming A and B are listed as Cluster Center Variable, typing A B A*B specifies variables A and B, and the interaction between A and B as fixed effects, and constructs a two-way ANOVA model.
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A vertical bar (|) can be used to create main effects and interactions. For example, typing A|B is the same as typing A B A*B.
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If you change your mind and would like to reset the field, click .
