Fixed Effects

Indicate primary effects by which to model the mean of the response variable in this field.

Observe the following conventions in this field:

•	Separate the effects with spaces.

•	Use an asterisk (*) to create interactions. For example, assuming A and B are listed as Class Variables, specifying A B A*B constructs a two-way ANOVA model.

•	Use a vertical bar (|) to create main effects and interactions. For example, A|B|C is the same as A B A*B C A*C B*C A*B*C.

•	Use an at-sign (@) following the use of vertical bars to remove interaction terms. For example, A|B|C@2 removes the three-way interaction term from A|B|C.

To Specify Fixed Effects:

Type the fixed effects in the Fixed Effects field.