Hi,
I was wondering about the influence of the keyword parameter_source
in SpecifyModel on the model fit.
The documentation says:
parameter_source: (‘SPM’ or ‘FSL’ or ‘AFNI’ or ‘FSFAST’ or ‘NIPY’,
nipype default value: SPM)
Source of motion parameters
The default value is SPM
, so it seems obvious that if motion correction has been done with fsl’s mcflirt, you would want to change it to FSL. However, in the fsl
example workflow, the model is specified with SPM
as parameter source, even though motion correction was done with mcflirt. So, does it matter at all what you choose there?
The reasoning I am asking, is that for a couple of all the runs in my dataset, fitting the autoregressive model during film_gls
crashes due to a singular design matrix, and I can’t find an obvious reasons for that. So, perhaps the parameter_source might play a part in that?