Dear SPM team,
For EEG data coming from 7 subjects during A1B1 A1B2 A2B1 A2B2 conditions, I followed Donald's advice from https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=spm;792d3c54.1210 to define the t-contrasts. However the construction of the F-contrasts isn't clear to me. Would the contrast
[1 -1 0 0 .5 .5 -.5 -.5; -1 1 0 0 -.5 -.5 .5 .5]
to test the effect of factor A?
Also, I also tried this the indirect way by creating contrast images for each subject using contrast [1 1 -1 -1] and then using single-sample t-tests. Although I obtain very similar results, these are different, and I suppose this is due to not taking the subject factor into consideration. Any comments on this?
Best regards,
Eduardo
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