help > sessions comparisons
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Jul 2, 2019 12:07 PM | anood
sessions comparisons
My project is contain one healthy group and I have 2 fMRI scans
(each scan has 2 sessions, one scan pre-training and the
second scan post- training) . I want to know the different in
connectivity between pre and post training for each subject and
across the group.
when I upload the data I upload it as 4 sessions per subject. Is that right?
1- how to compare between sessions (2 sessions pre- and 2 post- training)? and is it possible to compare across same subject and across the group ?
3- Is paired t test the correct choose for 2nd level analysis?
could you please describe the way in details for me .
Many thanks
when I upload the data I upload it as 4 sessions per subject. Is that right?
1- how to compare between sessions (2 sessions pre- and 2 post- training)? and is it possible to compare across same subject and across the group ?
3- Is paired t test the correct choose for 2nd level analysis?
could you please describe the way in details for me .
Many thanks
Jul 4, 2019 08:07 PM | Stephen L. - Coma Science Group, GIGA-Consciousness, Hospital & University of Liege
RE: sessions comparisons
Dear Anod,
In CONN you have the possibility to do 3rd-level analysis in the 2nd-level tab, by doing t-tests both at the sessions level and at the group level. So in your case I would input only 2 sessions per subject and setup the sessions accordingly in the "Conditions" sub-tab of the Setup tab, and create two groups (as 2nd-level covariates in the Setup tab), so that you will be able to do a 3rd-level analysis in the end as I wrote above.
I hope this helps,
Best regards,
Stephen
In CONN you have the possibility to do 3rd-level analysis in the 2nd-level tab, by doing t-tests both at the sessions level and at the group level. So in your case I would input only 2 sessions per subject and setup the sessions accordingly in the "Conditions" sub-tab of the Setup tab, and create two groups (as 2nd-level covariates in the Setup tab), so that you will be able to do a 3rd-level analysis in the end as I wrote above.
I hope this helps,
Best regards,
Stephen