Dear SPM experts.
I'm dealing with the spectral DCM analyses for resting-state fMRI data.
I think I finished the individual level analyses and got the values of connection strength (in Hz) for each individual from "DCM.Ep.A".
I took those values and t-tested to know whether the connection was different from zero.
For confirmation, I averaged those values across all participants but the value was totally different from the results of BPA.
Could you tell me why the value was different ??
In addition, was the t-test technically correct ?
Any comment would be appreciated.
Sincerely, Toshi
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