PCA on individual subjects or all subjects

[Talha Anwar]

Greetings, prof. If i have to apply PCA on eeg data, should i apply it on individual subjects such as pca on one subject, then on 2nd and so on?

Or should i apply it on all subjects at the same time

[Mike X Cohen]

I generally prefer doing all analyses first at the single-subject level, because that accounts for possible differences in individual anatomy, electrode cap placement, etc. Doing a PCA over all subjects could also work, and would capture the main consistencies over subjects.

Mike

On Thu, Jul 4, 2019 at 12:44 PM Talha Anwar <chtalh...@gmail.com> wrote:

Greetings, prof. If i have to apply PCA on eeg data, should i apply it on individual subjects such as pca on one subject, then on 2nd and so on?

Or should i apply it on all subjects at the same time

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Mike X Cohen, PhD
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