I am recording EEG sessions with Muse Direct.
I then go to musedirect.choosemuse.com to download a CSV of the results.
I was under the impression that columns such as delta_absolute_1 are showing the log of the PSD for that range. However, I am seeing negative numbers occasionally. I don’t think logs can be negative though.
So am I wrong about what the unit of measurement is in columns such as delta_absolute_1? Or am I wrong about logs not being able to be negative?