# GLM Repeated Measures Model

**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.

**Between-Subjects.** The between-subjects factors and covariates are listed.

**Model.** The model depends on the nature of your data. After selecting Custom, you can select the within-subjects
effects and interactions and the between-subjects effects and interactions
that are of interest in your analysis.

**Sum of squares.** The method of calculating the sums of squares for the between-subjects
model. For balanced or unbalanced between-subjects models with no
missing cells, the Type III sum-of-squares method is the most commonly
used.

Obtaining Models for GLM Repeated Measures

This feature requires SPSS® Statistics Standard Edition or the Advanced Statistics Option.

- From the menus choose:
- Define your factors.
- In the Repeated Measures dialog box, click Model.
- In the Repeated Measures Model dialog box, select Custom.
- Select one or more within-subjects factors.
- Select a method for building the terms and then move the within-subjects factors.
- Repeat these steps for
within-subjects factors and between-subjects factors and covariates
until you have the model you want. The interaction of each between-subjects
term with each within-subjects term is automatically included in the
model. That is, if
*W*is a within-subjects factor in the model and*B*is a between-subjects factor in the model,*W*B*will be in the model.

Optionally, you can change the type of sum of squares.

Do not use the same term more than once in the model.