- Thread starter sverm
- Start date
- Tags ancova moderators

1. Use a regression analysis. Problem is, you will have to turn your IV into dummy variables and use 15 different interaction variables.

2. Transform each continuous variable into an ordinal variable, with only a few possible values. Problem is, you will lose resolution. Plus, you need a big sample. However, this comes with a benefit - you will be able to detect non-linear patterns, if they exist.