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Hi Niraj, It's stored in the SPM.mat file structure (SPM.xX.erdf). Depending the model, there are different formulas for calculating the degrees of freedom. Best Regards, Donald McLaren, PhD On Tue, Jun 20, 2017 at 9:43 AM, Sharma, Niraj <[log in to unmask]> wrote: > Dear SPM experts, > > I was wondering if there is a way of calculating the degrees of freedom in > SPM for my GLM and how much the degrees of freedom should be for my model > to be considered sufficient. > > Please note, my model contains 3 effects of interest convolved with the > canonical HRF and time and dispersion derivatives (3x3 parameters). > > Many thanks, > > Niraj > > -- > > Niraj Sharma > > PhD Student > UCL, Institute of Neurology > Department of Clinical and Experimental Epilepsy >