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help > RE: session specific regressors
Mar 15, 2016 09:03 PM | Alfonso Nieto-Castanon - Boston University
RE: session specific regressors
Dear Katie,
When importing the Setup information from SPM.mat files typically the "SPM covariates" variable will include anything that was defined as first-level covariates in the original SPM design (e.g. motion regressors). Regarding the "session-effects regressor" (a all 1's regressor for each session, removing the average BOLD signal level separately within each session) CONN handles this the same way that SPM does, basically these regressors are not considered part of the first-level covariates list, but they are always automatically added to the design matrix nevertheless (i.e. in CONN they will not appear as part of your "SPM covariates" list, yet they will be automatically added by CONN to the design matrix used in the Denoising step in order to remove the session-specific average BOLD signal from the timeseries).
Hope this helps
Alfonso
Originally posted by Katie Surrence:
When importing the Setup information from SPM.mat files typically the "SPM covariates" variable will include anything that was defined as first-level covariates in the original SPM design (e.g. motion regressors). Regarding the "session-effects regressor" (a all 1's regressor for each session, removing the average BOLD signal level separately within each session) CONN handles this the same way that SPM does, basically these regressors are not considered part of the first-level covariates list, but they are always automatically added to the design matrix nevertheless (i.e. in CONN they will not appear as part of your "SPM covariates" list, yet they will be automatically added by CONN to the design matrix used in the Denoising step in order to remove the session-specific average BOLD signal from the timeseries).
Hope this helps
Alfonso
Originally posted by Katie Surrence:
Dear all,
I have imported my design from SPM and I want to use Conn for denoising and then take my data back to another program, probably not SPM. I was wondering if "SPM covariates" included everything that was not a condition; i.e., does it include the regressor for each session in the last portion of the design matrix?
Thanks very much.
Best,
Katie
I have imported my design from SPM and I want to use Conn for denoising and then take my data back to another program, probably not SPM. I was wondering if "SPM covariates" included everything that was not a condition; i.e., does it include the regressor for each session in the last portion of the design matrix?
Thanks very much.
Best,
Katie
Threaded View
| Title | Author | Date |
|---|---|---|
| Katie Surrence | Mar 15, 2016 | |
| Alfonso Nieto-Castanon | Mar 15, 2016 | |
| Katie Surrence | Mar 16, 2016 | |