Specifically, I was wondering how these measures (PLV, PTE, etc) are calculated when the option to apply the scout function "After" is selected using a 1xN analysis
The option before/after defines when the scout function is applied to group multiple source values into one scout value. For the connectivity measures, the logic is the same as for the time-frequency analysis:
https://neuroimage.usc.edu/brainstorm/Tutorials/TimeFrequency#Scouts
The option "after" groups Na x Nb connectivity values for the NxN case (scout A with Na sources, scout B with Nb sources), or Na x 1 values for the Nx1 case,
There is no consensus yet on what the best approach is, therefore we can give recommendations on which option to use.
@Raymundo.Cassani Please make sure this option before/after is correctly documented in the future connectivity tutorial - Thanks!
https://neuroimage.usc.edu/brainstorm/Tutorials/Connectivity2