Mixed between-within subjects ANOVA: Model

The Model dialog specifies the effects to be analyzed.

Specify model

You can analyze a full factorial model (all main effects for covariates, and all main effects and interactions among factors), a custom model (subset of interactions and main effects), or specify particular terms (for example, for nested designs).

Full factorial

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. By default, a full factorial model is analyzed (when neither Generate terms nor Write terms are selected).

Generate terms

The model depends on the nature of your data. Clicking Generate terms allows you to select the main effects and interactions that are of interest in your analysis. For more information, see Generate terms and Write terms.

Write terms

Select to include nested terms or when you want to explicitly build any term variable-by-variable. For more information, see Generate terms and Write terms.

Intercept

The intercept is the estimate of the dependent variable when all independent variables are 0. If you can assume that the data pass through the origin, you can exclude the intercept.

Include intercept in model

The intercept is usually included in the model. If you can assume that the data pass through the origin, you can exclude the intercept.

Sum of squares

The method of calculating the sums of squares. For balanced or unbalanced models with no missing cells, the Type III sum-of-squares method is most commonly used. For more information, see Sum of squares.