I am a new user Brainstorm (and signal processing) and would like to seek advice regarding my project. My research question is to identify which condition has a stronger brain response by comparing the power of the brainwaves (theta, alpha, gamma), and to identify where and when the conditions are different.
We have recorded resting state/continuous of simultaneous EEG and MEG.
Recording conditions: passive receptive listening in awake state with eyes closed, 10 experimental conditions, each 3 minutes recording. I have 2 groups of 15 each, a total of 30 subjects.
I have followed the pre-processing steps mentioned in the tutorials, and verified that the data is clean.
Now I am planning to go for the sensor based analysis for the EEG recordings.
I have computed the PSD in time domain and group in frequency Bands for a time window between 60-120 seconds, followed by spectrum normalization (relative power). Then I computed the average for each condition of same group (average > average files by folder (grand average) + arithmetic average.
When trying to compute the differences between 2 averaged files I got this error
And here are the files contents .
how to solve this error ?
would you please verify my research questions ? does the analysis plan would answer my question ?