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help > RE: what is the " normalization" in ALLF or LCOR?
Jan 9, 2021 05:01 PM | Alfonso Nieto-Castanon - Boston University
RE: what is the " normalization" in ALLF or LCOR?
Hi Kim,
The 'normalization' option in any voxel-to-voxel first-level analysis refers to an optional within-subject normalization step, where the raw values at each voxel (e.g. x = average correlation coefficients in LCOR) are transformed using a non-linear function so that their distribution across all voxels is Gaussian with mean zero and standard deviation one (the non-linear function y=f(x) is defined as y=norminv(p(x)) where p(x) is the proportion of voxels with values at or below x).
Best
Alfonso
Originally posted by SUHONG KIM:
The 'normalization' option in any voxel-to-voxel first-level analysis refers to an optional within-subject normalization step, where the raw values at each voxel (e.g. x = average correlation coefficients in LCOR) are transformed using a non-linear function so that their distribution across all voxels is Gaussian with mean zero and standard deviation one (the non-linear function y=f(x) is defined as y=norminv(p(x)) where p(x) is the proportion of voxels with values at or below x).
Best
Alfonso
Originally posted by SUHONG KIM:
I am a user of CONN (20.b)
What is the exact definition of the " normalization" in the ALLF or LCOR?
Is the value normalization in each individual or between groups?
What is the exact definition of the " normalization" in the ALLF or LCOR?
Is the value normalization in each individual or between groups?
Threaded View
| Title | Author | Date |
|---|---|---|
| SUHONG KIM | Dec 22, 2020 | |
| Alfonso Nieto-Castanon | Jan 9, 2021 | |
| Emily Stern | Jul 27, 2021 | |
| Zaeem Hadi | Apr 26, 2022 | |
| Alfonso Nieto-Castanon | Apr 27, 2022 | |