Dear Vladimir,
Thanks for pointing me in the right direction. I had already processed my M/EEG.mat files through the group inversion with 'induced' option. I've now input those .mat files into the 'M/EEG inversion results' module of the batch editor. I re-selected the same time and frequency windows of interest that I previously specified in the group inversion, and selected the 'single trials' option. SPM is now outputting the single trial files I expected.
Is that the correct process?
For future analyses, if I use the 'M/EEG source inversion' module of the batch editor, is that equivalent to group inversion?
Thanks again.
Jennifer Gethin
PhD Student
Neuroscience and Aphasia Research Unit
School of Psychological Sciences
Zochonis Building
University of Manchester
M13 9PL
From: Vladimir Litvak <[log in to unmask]>
Sent: 19 June 2014 13:40
To: Jennifer Gethin
Cc: [log in to unmask]
Subject: Re: [SPM] Group inversion for single trial source analysisDear Jennifer,
Yes, you can do it if you export images for each subject separately after group inversion or run the group inversion using the batch tool. It's just that this option is missing in the group inversion script.
Best,
Vladimir
On Thu, Jun 19, 2014 at 1:36 PM, Jennifer Gethin <[log in to unmask]> wrote:
Dear SPM experts,
I have a question about source analysis at the single trial level using the group inversion option.
Unlike when I have used an individual subject source analysis, when I do a group inversion, there is no option to select 'trials' for power, only 'evoked' or 'induced'. Is it possible within SPM to produce an image per trial using a group inversion?
Many thanks,
Jennifer Gethin
PhD Student
Neuroscience and Aphasia Research Unit
School of Psychological Sciences
Zochonis Building
University of Manchester
M13 9PL