[Eeglablist] Help with ERP study

[Cedric Cannard]

Hi Sonia,

The wiki may help: https://urldefense.com/v3/__https://github.com/LIMO-EEG-Toolbox/limo_tools/wiki/EEGLAB-STUDY:-run,-session,-condition-and-group__;!!Mih3wA!FZqPLaEJ99pTcOd4KkNm83FA2P32CnL9bdTiCacKHTuzCxrvagHvOb6_PZVdjPSs-3MwyuyOwEOVlsOhDBOWN1WuiA$ 

Why not process the data in EEGLAB directly? 



> so I'm not running ICA here - is that fine?

That depends what you are trying to do. 


> I have 4 recordings per participants that correspond to the 4 tasks they did. I wanted to compare the EEG signal in these tasks to see if there is any difference by running a 2x2 design.

If I understand correctly, LIMO-EEG expects one file per subject, with event markers defining the different conditions. They need to be in the files to be detected by EEGLAB, so you can edit your design accordingly in STUDY > Edit study design. 

Hope this helps,

Cedric Cannard



On Sunday, 6 July 2025 at 07:03, Sonia Mariotti via eeglablist <eeglablist at sccn.ucsd.edu> wrote:

> Hi all,
> 
> I created a study in eeglab and wanted to run LIMO, but I run into some issues. I'm new to eeglab and to coding as well, so I've mostly used the GUI and a little bit of code from chatGPT. You can see in the screenshot how I built the study. The data was segmented and pre-processed in Brain Vision Analyzer, so I'm not running ICA here - is that fine?
> I have 4 recordings per participants that correspond to the 4 tasks they did. I wanted to compare the EEG signal in these tasks to see if there is any difference by running a 2x2 design. When I go to Study > Edit study design, I don'manage to select the two factors of interest, which are task condition and task type. I wonder if it's because of how I organised the recording into the study, as I cannot retrieve these two factors in the list of options (I only get to select the four conditions or the markers I assigned to each trial).
> 
> 
> I have managed to pre-compute and plot channel measures, but I wanted to run statistical analysis. When I try to run LIMO an error message pops up: No results files were found and ask if I want to browse for a .mat file, which I don't think I have.
> 
> Thanks for your help!
> 
> 
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