Adjustment Effects

Use the text box to specify:

•	effects by which to adjust the principal components before modeling their sources of variability, and

•	known sources of variability that are not to be included in the output pie chart.

For purposes of modeling, all effects specified here are considered fixed effects.

Caution: Do not repeat any effects here that have been listed in the Variance Component Effects field.

To Specify Adjustment Effects:

Type one or more effects in the text field.

If you specify more than one effect, then you must separate the effects with spaces. For example, assuming A and B are listed as Class Variables, typing A B in the text field specifies variables A and B as main fixed effects.

To specify interactions between effect, type an asterisk (*) between the effects. For example, assuming A and B are listed as Class Variables, typing A B A*B specifies variables A and B, and the interaction between A and B as effects.

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.

An at-sign (@) can be used to limit the number of interactions. For example, typing A|B|C@2 removes the three-way interaction term.