[Eeglablist] Residual drift following High-pass 0.1

Tarik S Bel-Bahar tarikbelbahar at gmail.com
Thu Sep 17 15:27:46 PDT 2015


Hello Joshua, some quick thoughts below that might help. Cheers!

I would say first figure out what happens when you put a 1hz highpass
 filter, and also what happens when you remove baseline from all channels.
Also see past eeglab list discussions about removing DC offset, which might
be relevant to your case.
Also see what happens when you are looking at just the highpassed "periods
of interest" or "epochs", rather than the highpassed raw continuous data.




On Tue, Sep 15, 2015 at 10:54 AM, Baker, Joshua <joshua.baker at ntu.ac.uk>
wrote:

> Dear EEGers
>
>
> Following high-pass filtering (0.1 Hz) of my EEG data there still appears
> to be some residual drift. Please see below screenshot. Any ideas as to
> what could be the cause of this? I have played around with different high
> pass parameters however the drift still persists!
>
>
>
>
> Thanks,
>
>
> Joshua Baker
>
> NTU Psychology
>
>
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