[Eeglablist] What would be the best way to determine dipole locations for P300 responses?

[Fuh-Cherng Jeng]

Dear all,

I have recorded P300 responses using a 64-channel cap in two groups of 
participants and found that the P300 latencies in group A is significantly 
longer than those in group B.  As a follow-up of this finding, I would like 
to do some dipole fitting and see if the P300 dipole locations are 
significantly different between the two groups.  I have two methods in 
mind, but am not sure which method would be making any sense at all. 
sense than the other in terms of finding the dipole locations for P300 
responses.

(1) use dipfit_erpeeg() to fit the ERP topography at the time point where 
the P300 latency is determined by the experimenter.

(2) do ICA first and use multifit() to do a dipole fitting on a specific 
ICA component that correspond the best to the P300 responses.


If anyone could help me with this or simply tell me a better way of finding 
the P300 dipole locations, I would greatly appreciate it.

Sincerely,

Fuh