For example: General Linear Model Regression: summary of coefficients for between variable effects
What does each "Level of Effect" represent for variable interaction terms? e.g. Level of Effect 1 to 10 for interaction terms of variables gear*carb
In the General Linear Model dialog, under "Summary" tab, click on "Design Terms"
This will show the categorical group combinations for each level of effects of the variable interaction term.
For example, in above table,
group "g5" is used as reference group for variable gear and group "c8" is used as reference group for variable carb.
level of effect 1 of the interaction term gear*carb corresponding to column "12" represents gear group "g3" * carb group "c1".
level of effect 2 of the interaction term gear*carb corresponding to column "13" represents gear group "g3" * carb group "c2".
and so on...