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Event regressors
Event regressors:
EA video osnets and durations
Circles videos onsets and duration
EA button presses (Dur = 0)
Circles button (Dur=0)
parametric modulators or EA (edited)
1:50
Regressors: mf.CSF mf.WhiteMatter fd mf.X mf.Y mf.X mf.RotX mf.RotY mf.RotZ and then diff for: mf.X mf.Y mf.X mf.RotX mf.RotY mf.RotZ
SPINS EA Parametric Modulation in GLM analysis
The GLM t-map contrasts were not consistent in Nistats in comparing to AFNI and SPM, which based on 10 random subjects that we have chose.
What we know right now:
- By averaging parametric modulation across 6 videos (similar to SPM and AFNI way) and adding these values into the design matrix for GLM analysis. The output t-map contrasts were still not consistent.
- The columns in the design matrix were highly correlated across SPM, AFNI, and SPM
- I have rerun the GLM analysis with N-back task, and the results were consistent between SPM and Nistats
- We decided to use AFNI to run GLM analysis for SPIN EA task
Future thing to do:
- Post a precise and sophisticated question on neurostars to address how Nistats incorporate the parametric modulation in the GLM model.
- Perhaps we should share our results so other people who ran into the same problem can read what we have done.
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