Hello SPMers,
Here are the basics of my question:
Design:
Mixed ANOVA @ Rfx level: one between subject factor with 2 levels (adults &
kids); and one within subject factor with 3 levels (low, normal, high).
Goal:
3 levels of memory load across 2 groups.
Question:
What is the best way to look at the group by load interaction?
Searching archived postings, previous suggestions have included:
-parametric modulation (zero 1st 2nd order polynomial expansions)
2 sample t test on 1st-order and 2nd-order terms
represents grouping by memory load interaction
-use PET design
Are there other suggestions?
Thank you in advance!
Sincerely,
Ray Reisner
|