Dear SPMers,
I have performed a beamformer analysis (SAM) for an MEG study. Our experimental design has two independent variables that have 2 levels(high-low). So I want to do a factorial 2x2 design. Originally, I aimed to use SnPM but I found the plugins offered not enough for a 2x2 factorial design. Maybe it is due to lack of understanding SnPM's potential in such a design. So I used the 2nd level statistics in SPM and created a factorial design with two variables as factors. There it was possible to set the levels of these factors. Finally, I got the main effects for the two variables.
I have the following questions
1. I did not find studies on MEG using 2nd level analysis. Instead I found MEG studies using SnPM. Does anyone know whether it is methodologically correct to perform 2nd level analysis in in SPM for SAM images. Any papers?
2. SnPM is offered as an alternative to SPM. How do they correlate? Although I could not perform a factorial design, should I expect same results for a one sample test, or a paired t test implemented in both SnPM and SPM?
Any answer is kindly appreciated
Haris
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