I’m new to EEG analysis and I have a question that might have a simple answer.
I want to perform time-frequency analysis on EEG data. I have blocks of trials for the left and right hand. If I wanted to do the analysis, say, on the left side, I would probably need to concatenate my data to join all the left-side blocks. So my question is, what would be better?: Concatenate the raw data, then preprocessing, and then epoching that data; or preprocess the raw data separately, epoch each of those files, and then concatenate the epochs? Is there any difference?
Thanks in advance.