Dear Muhammad,
The 1st level button in MEEG is presently used for averaging images
over time dimension. You don't have to use it unless you want to look
at a single topography. You can indeed go directly to specifying your
design with the 2nd level button.
Vladimir
Sent from my iPad
On 13 Sep 2010, at 15:41, MP <[log in to unmask]> wrote:
> Hello M/EEG SPMers,
>
> Finally I have been able to pre-process the data and now I have all my time-domain and TF-domain data averages. I have also been able to convert these files to image files, and now am ready to do some analysis. However, I have some questions:
>
> 1. What exactly is the 1st Level analysis doing in EEG analysis?
>
> 2. Do I have to do the 1st level, even if I don't have an a priori temporal ROI? or Should I directly go to 2nd level analysis (as done in the SPM manual)?
>
> 3. I have 2 groups and 4 conditions each, should I just create a full-factorial with these 2 levels and do within- and between-group analysis from that design?
>
> Thanks
>
> - Muhammad
|