# Ordinal Regression Scale Model

The Scale dialog box allows you to specify the scale model for your analysis.

**Factors/covariates. **The factors and covariates are listed.

**Scale model. **The model depends on the main and interaction effects that you select.

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.

To Specify an Ordinal Regression Scale Model

This feature requires the Statistics Base option.

- From the menus choose:
- In the Ordinal Regression dialog box, click Scale.
- Build the scale model that you want.