There might be some problem with your epoching but it's not related to
what you see in the reviewing tool. That's always deisplayed when
there is more than one event in a trial.
On Thu, Feb 16, 2012 at 6:24 PM, Deborah Talmi
<[log in to unmask]> wrote:
> Hi there,
> I'm processing an EEG dataset where we didn't record HEOG/VEOG. I created an EOG channel by comparing AF3 and AF4 (using the montage tool) and used spm_eeg_detect_eyeblinks. This graphics window shows that a good number of eye blinks are detected. However, when I epoch the file, many of the trials have 'multiple events' in the columns type, value, duration, and time. Others still show 'eyeblink' and 'artefact'.
> The 'multiple events' entry only occurs when I epoch the montaged file - regardless of whether I choose to epoch 'real' evenets or eyeblinks - it doesn't happen when I epoch the original file. Could you possibly explain why?
> The reason I'm concerned is that when I merge and average the epoched files the EOG data looks like junk - I'm wondering if there's an error in my epoching process?
> Thanks, Deborah