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Dear Chao, Beamforming is a good method to look at oscillatory activity (a.k.a. induced power or induced responses). It's not so good for looking at evoked responses which is what the original data in the tutorial mostly contains. For that the SPM MSP source reconstruction is clearly better. Best, Vladimir On Wed, Aug 17, 2011 at 6:00 AM, Chao Liu <[log in to unmask]> wrote: > Dear all: > > I see that the LCMV beamforming works well on the simulated data sim_data_aud1020Hz.mat in Chapter 35 (MEG SOURCE LOCALISATION). Then I try the same procedure on the real data cdbespm8_SPM_CTF_MEG_example_faces1_3D.mat, it does not work at all. So I just wonder that in which circumstances I can use beamforming to reconstruct source powers? > > Many thanks > Chao >