Did anyone ever figure this out? I just came across the same problem. In
essence, the issue is:
1. Use a flexible factorial design
2. Define subject/main effects/interaction factors etc...
3. Run analysis and get result A
4. Include a critical covariate that should change the results
5. Re-run analysis and get result B [using same contrast matrix in A]
6. Result A is exactly identical to B, so the covariate has not been taken
into account in the modeling procedure.
- DC
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