Dear Clare,
What are the values from the voxels that are outside the brain in these
preprocessed data?
Best regards,
Guillaume.
On 01/06/2021 13:16, Clare Lally wrote:
> Hi there,
>
> I am trying to estimate a first-level model from an open-access data set (NNDb - https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fopenneuro.org%2Fdatasets%2Fds002837%2Fversions%2F1.0.6&data=04%7C01%7C%7Cec1317a7c9ff42752ce708d924f897ed%7C1faf88fea9984c5b93c9210a11d9a5c2%7C0%7C0%7C637581473056897028%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=VH%2FmbNOOnB8T4BZEaA6XelDrf2wQAY9MrIfUURmC0wA%3D&reserved=0). When I try to estimate the model, I get the following error:
>
> 1-Jun-2021 11:44:27 - Failed 'Model estimation'
> Error using spm_est_non_sphericity (line 208)
> Please check your data: There are no significant voxels.
> In file "/Documents/spm12/spm_est_non_sphericity.m" (v7577), function "spm_est_non_sphericity" at line 208.
> In file "//Documents/spm12/spm_spm.m" (v7738), function "spm_spm" at line 433.
> In file "/Documents/spm12/config/spm_run_fmri_est.m" (v7354), function "spm_run_fmri_est" at line 36.
>
> I've seen from a previous post that the model will fail if the data are mean-centred, which is the case with this data (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.jiscmail.ac.uk%2Fcgi-bin%2Fwa-jisc.exe%3FA2%3Dind1903%26L%3DSPM%26O%3DD%26X%3DE537569FA45316EF17%26Y%3Dc.lally%2540ucl.ac.uk%26P%3D193727&data=04%7C01%7C%7Cec1317a7c9ff42752ce708d924f897ed%7C1faf88fea9984c5b93c9210a11d9a5c2%7C0%7C0%7C637581473056897028%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=v3SWayrgd%2F6pzkiwlj4S6CWYKg6hROdd26Y95hYMSIw%3D&reserved=0). Please can I have advice on whether I can still estimate a first-level model with the mean-centred data on SPM, and what I would need to add to the batch script etc to achieve this?
>
> Thank you so much!
>
> All the best,
> Clare
>
--
Guillaume Flandin, PhD
Wellcome Centre for Human Neuroimaging
UCL Queen Square Institute of Neurology
London WC1N 3BG
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