Hi Francois,
I just found out a weird Brainstorm behavior. Assume I have 10 conditions with 40 trials each. I can
- Average all 400 trials to produce a grand total trial
- Create 10 condition-specific averages, and then average them to create a grand total trial.
Both 1 and 2 should give the same result. However, when I plot the dspm maps, I get scaling inconsistencies and the results are different.
BST> Loading dspm maps: scaling the values by 3.16 to match the number of trials averaged (1 => 10)
BST> Loading dspm maps: scaling the values by 20 to match the number of trials averaged (1 => 400)
Best,
Dimitrios