[Mne_analysis] Linear regression on Time Frequency data

Alexandre Gramfort alexandre.gramfort at inria.fr
Mon Jul 13 08:49:54 EDT 2020
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hi Sebastian,

the only thing I can suggest is that if you think the signal is in the
time-frequency
power than you should not process electrodes separately but use dedicated
spatial filtering techniques that can boost SNR (See CSP, SpOC in the
MNE-Python
documentation).

HTH
Alex


On Tue, Jul 7, 2020 at 11:33 AM S.P.H. Speer <speer at rsm.nl> wrote:

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> Hi Alex,
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> I create subject level contrasts (conflict versus no conflict) and then want to run a group-level analysis where I want to use a continuous variable, which is an individual difference measure (number of trials on which the participant cheated),  as a predictor in a linear regression with t-values from the within subject contrasts (conflict versus no conflict) as dependent variable. Stated differently, I want to see whether frequency of cheating across individual can explain differences how conflict versus no conflict trials are modulated in the brain.
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> I’ve got the within-subject contrasts for each subject TF-maps one for each channel and am now wondering which function I can use to run this group-level analysis?
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> Thanks for your help,
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> Sebastian
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> hi Sebastian,
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> can you step back and explain the overall aim of the procedure?
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> what would you like to show with your data? is it group level?
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> a contrast?
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> Alex
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> On Mon, Jun 29, 2020 at 6:14 PM S.P.H. Speer <speer at rsm.nl <https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis>> wrote:
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> >*         External Email - Use Caution*
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> >* Dear MNE-team,*
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> >* I’m trying to run a linear regression analysis on Time-Frequency data. I’ve got the average TFR for each for each subject and want to regress and individual difference measure on the time frequency data for a specific channel. The data has the same dimensions as for running linear regression on epochs but instead of channels I’m using frequencies. Unfortunately the linear_regression function provided by MNE does not allow TFR data as input. Is there a workaround for this problem? I would also like to run cluster-based permutation tests on the results of the linear regression to estimate significance. Would that be feasible?*
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> >* Thank you very much for your help,*
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> >* Sebastian*
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