[Eeglablist] Creating and Saving Difference Waves

[Cedric Cannard]

Hi Naomi

Not sure I follow your terms and what you are trying to do, but sounds you should use the LIMO plugin.
Code, wiki and tutorial: https://urldefense.com/v3/__https://github.com/LIMO-EEG-Toolbox/limo_tools/wiki__;!!Mih3wA!Hi-LPobgnSKJxFEDIvhqP0geWbqH25oeTn7faKiZBqlD0GisiSfCRpXrDHo7s2U8eX5pOcR3Ao0NGZuNvR-zTq_fow$ 

You can also install it from the EEGLAB's extension manager.

Youtube video on the theory: https://urldefense.com/v3/__https://www.youtube.com/watch?v=mZbK6KvMF2I__;!!Mih3wA!Hi-LPobgnSKJxFEDIvhqP0geWbqH25oeTn7faKiZBqlD0GisiSfCRpXrDHo7s2U8eX5pOcR3Ao0NGZuNvR_r_RgEqg$ 
Youtube video on practice: https://urldefense.com/v3/__https://www.youtube.com/watch?v=7EWN2w0kSy4__;!!Mih3wA!Hi-LPobgnSKJxFEDIvhqP0geWbqH25oeTn7faKiZBqlD0GisiSfCRpXrDHo7s2U8eX5pOcR3Ao0NGZuNvR8l929dNg$ 

Hope this helps!

Cedric

------- Original Message -------
On Thursday, April 20th, 2023 at 7:58 AM, Naomi Heffer <nrh31 at bath.ac.uk> wrote:

> Hi Cedric,
>
> Thank you for your reply. The issue is that I want to statistically compare the difference waves across modality conditions, rather than comparing oddball and frequent ERPs. As the STUDY structure can only manage a two-way ANOVA as far as I can see (and I already have two independent variables), introducing a comparison between oddball and frequent would not be possible - unless there is a way to do a multifactorial ANOVA using the STUDY structure that I am not aware of?
>
> Many thanks,
>
> Naomi
>
> ---------------------------------------------------------------
>
> From: Cedric Cannard <ccannard at protonmail.com>
> Sent: 19 April 2023 17:46
> To: Naomi Heffer <nrh31 at bath.ac.uk>
> Cc: 'eeglablist at sccn.ucsd.edu' <eeglablist at sccn.ucsd.edu>
> Subject: Re: [Eeglablist] Creating and Saving Difference Waves
>
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> Hi Naomi,
>
> The differences between conditions is done at the STUDY level. You just need to process your files one by one, save them as .set files, and then create a STUDY, edit the design, and run statistics to see the differences between your conditions.
>
> See the tutorial here: [https://urldefense.com/v3/__https://eur01.safelinks.protection.outlook.com/?url=https*3A*2F*2Feeglab.org*2Ftutorials*2F10_Group_analysis*2Fstudy_creation.html&data=05*7C01*7Cnrh31*40bath.ac.uk*7Cc2cf4c47de6349c5c23b08db40f5a1aa*7C377e3d224ea1422db0ad8fcc89406b9e*7C0*7C0*7C638175195940345825*7CUnknown*7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0*3D*7C3000*7C*7C*7C&sdata=6*2FA8WM22OqT4sCgrqYCEb0nE6Cjrl5OEVpaQtR6y*2BKI*3D&reserved=0*(https:**Aeeglab.org*tutorials*10_Group_analysis*study_creation.html)__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlXS8vLy8v!!Mih3wA!Hi-LPobgnSKJxFEDIvhqP0geWbqH25oeTn7faKiZBqlD0GisiSfCRpXrDHo7s2U8eX5pOcR3Ao0NGZuNvR8RHxwLkA$ 
>
> Cedric
>
> ------- Original Message -------
> On Wednesday, April 19th, 2023 at 2:50 AM, Naomi Heffer via eeglablist <eeglablist at sccn.ucsd.edu> wrote:
>
>> Dear list,
>>
>> I have an experiment where I have frequent and oddball ERPs in different modality conditions (audio, audiovisual and visual), and I want to create difference waves between the oddball and frequent waveforms for each modality condition, so that I can then statistically compare these difference waves between the three modality conditions.
>>
>> Is there a way of creating the difference waves in eeglab and saving them in a '.set' format so I can load them into a STUDY for subsequent statistical analysis?
>>
>> Many thanks,
>>
>> Naomi
>> _______________________________________________
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