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help > RE: Connectivity values of each subject in PPI
Jun 2, 2016 05:06 PM | Alfonso Nieto-Castanon - Boston University
RE: Connectivity values of each subject in PPI
Dear Shige,
Yes, those files will contain the values that will be entered into the second-level analyses. Their interpretation will vary depending on the type of first-level analysis performed (e.g. when selecting bivariate weighted-GLM analyses they represent raw connectivity values for each condition, while when selecting gPPI they represent the size and direction of the connectivity modulation for each condition compared to baseline) as well as on the chosen first-level analysis measure (e.g. when selecting correlation measures they represent fisher-transformed correlation vales, while when using regression measures they represent regression coefficient values)
Hope this helps
Alfonso
Originally posted by Shigetoshi Takaya:
Yes, those files will contain the values that will be entered into the second-level analyses. Their interpretation will vary depending on the type of first-level analysis performed (e.g. when selecting bivariate weighted-GLM analyses they represent raw connectivity values for each condition, while when selecting gPPI they represent the size and direction of the connectivity modulation for each condition compared to baseline) as well as on the chosen first-level analysis measure (e.g. when selecting correlation measures they represent fisher-transformed correlation vales, while when using regression measures they represent regression coefficient values)
Hope this helps
Alfonso
Originally posted by Shigetoshi Takaya:
Dear CONN experts,
I want to extract the connectivity vales between each seed and target ROI for each subject after ROI-to-ROI PPI analysis was done. I found the fisher-transformed connectivity values (r-to-Z) in the following file:
conn_*/results/firstlevel/ANALYSIS_01/resultsROI_Subject###_Condition###.mat
I thought it is used when correlation measures were used in combination with PPI. Can I also use it when I selected 'regression' and 'task-modulation effects (gPPI)' in 'Analysis options' of first-level Analysis?
Thanks in advance,
Shige
I want to extract the connectivity vales between each seed and target ROI for each subject after ROI-to-ROI PPI analysis was done. I found the fisher-transformed connectivity values (r-to-Z) in the following file:
conn_*/results/firstlevel/ANALYSIS_01/resultsROI_Subject###_Condition###.mat
I thought it is used when correlation measures were used in combination with PPI. Can I also use it when I selected 'regression' and 'task-modulation effects (gPPI)' in 'Analysis options' of first-level Analysis?
Thanks in advance,
Shige
Threaded View
| Title | Author | Date |
|---|---|---|
| Shigetoshi Takaya | Jun 1, 2016 | |
| Alfonso Nieto-Castanon | Jun 2, 2016 | |
| Michael Parrish | Oct 4, 2017 | |