I have read a lot of the supporting documentation related to REST AlphaSim, along with many posts in the online forum; and although I feel I have a good understanding of the procedure I have two outstanding questions which my reading has not answered. I'd really appreciate your help in these matters.
1) How to determine the 'rmm' parameter to input properly.
I understand that this is the acceptable distance between the centre of voxels that can be counted as belonging to the same cluster. Therefore I have assumed that this relates to the smoothing kernel I applied [8 8 8], and have inputted 8. Is this correct?
2) Using the GUI to Estimate the FWHM from inputting a statistical map.
I have been enterring an SPMt file, which I read on the online forum is ok to do so. However, depending on which SPMt I used (according to the specific t contrast) I get different values as the estimate output. If this estimate influences the simulation output overall then the results of the simulation would only be valid for that particular ttest, and I would need to repeat this process every time I used a new contrast. This seems illogical to me, perhaps someone could explain it please?
Thanks in advance for the help,