Did you demean the task regressor? Is the problem that you cannot run tksurfer-sess? Or are you reporting multiple problems?

On 2/3/2021 8:32 AM, Doll, Laura wrote:

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Hi everyone,

Is it possible to do an FIR analysis using a task regressor instead of (or additional to) a paradigm file?

More precisely, we want to use pupil size as task regressor. It was recorded during an auditory detection task (event related).

This works when I use "-spmhrf" or other HRF options. However, for FIR I cannot get the expected time course in the single subjects data. Tksurfer ends with an error because it cannot find the file h.nii.gz:

ERROR: could not determine file for [...]/S01_3/bold/PupilFIR.lh/h

This file indeed does not exist, there is only one called "h-offset".

The commands I used until that point are (here neglecting the original task, but using -event-related etc instead of no task results in the same error):

mkanalysis-sess   -fsd bold -stc up  -surface fsaverage lh -fwhm 5 -notask -fir 4 20 -TR 2 -polyfit 2 -analysis PupilFIR.lh -per-run -taskreg Pupil 1

selxavg3-sess -s S01_3 -analysis PupilFIR.lh

tksurfer-sess -s S01_3 -analysis PupilFIR.lh -call -tksurfer

Is there any solution for this? Or any reason why it should not be done that way?

Best, Laura

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