Dear all,

We are addressing some reviewer comments regarding the use of random field theory for EEG. One of the the assertions made by our reviewer is that, because of the interpolation step needed to map electrode locations (128 in our case) onto a 2D grid/image (65*65 in our case) to be used in SPM, we're essentially increasing the number of statistical tests we need to correct for.

We want to argue that the number of tests we need to correct for is estimated based on the smoothness of the statistical map. One sub-argument here would be that interpolating data points in between electrode locations does not result in reduced smoothness (relative to the original EEG-based data). At least, that's how it seems to us intuitively. Is there any expert out there who has a more formal take on this?

Best,

Roy