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Hi all,

I would like to analyze fMRI group level data with an ANOVA design, and 
currently have two within-subject factors, each with 2 levels. Is it better 
to model the anova as a 2x2 design with these factors, or add an additional 
between subjects factor of N levels with one level for each of the N 
subjects (thereby adding an additional factor, but potentially better 
accouting for variability between subjects)?

thanks!

Amit