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help > RE: Splitting runs in half in CONN
Aug 4, 2021 11:08 PM | Alfonso Nieto-Castanon - Boston University
RE: Splitting runs in half in CONN
Dear Lillian,
Yes, exactly, you will end up with two conditions (e.g. task_early and task_late) each defining the onset/duration of the tasks within each half of the session, and you will then be able to enter both into a joint gPPI model and evaluate each condition separately (task-related connectivity within each half of the session) as well as their difference (differences in task-related connectivity strength between the first and second halves of the session)
Best
Alfonso
Originally posted by omaomae:
Yes, exactly, you will end up with two conditions (e.g. task_early and task_late) each defining the onset/duration of the tasks within each half of the session, and you will then be able to enter both into a joint gPPI model and evaluate each condition separately (task-related connectivity within each half of the session) as well as their difference (differences in task-related connectivity strength between the first and second halves of the session)
Best
Alfonso
Originally posted by omaomae:
Dear Alfonso,
Perfect! Thank you so much!
To quickly follow up, would I do something similar if I wanted to compare half the run with the other half for task-modulated functional connectivity using a gPPI analysis as well? As in, if I have one task condition, I simply split the task condition into two based on the onset times, model both conditions during the first-level analysis step when setting up the gPPI, and then I will have the connectivity matrices I need for each subject?
Best,
Lillian
Perfect! Thank you so much!
To quickly follow up, would I do something similar if I wanted to compare half the run with the other half for task-modulated functional connectivity using a gPPI analysis as well? As in, if I have one task condition, I simply split the task condition into two based on the onset times, model both conditions during the first-level analysis step when setting up the gPPI, and then I will have the connectivity matrices I need for each subject?
Best,
Lillian
Threaded View
| Title | Author | Date |
|---|---|---|
| omaomae | Aug 4, 2021 | |
| omaomae | Aug 5, 2021 | |
| Alfonso Nieto-Castanon | Aug 4, 2021 | |
| omaomae | Aug 4, 2021 | |
| Alfonso Nieto-Castanon | Aug 4, 2021 | |