The SPM HRF is a difference of gamma functions (one shifted in time wrt
the other). I have not studied it a lot, but I have not seen much of a
difference. The SPM HRF is a quasi-standard since most people in the
world are using SPM, but that does not necessarily make it better:). The
longer t
Dear FreeSurfers,
What exactly is the difference between the HRF function in gammafit vs.
SPMHRF? Are there reasons to prefer one to the other?
Thanks,
Dan Dillon, Ph.D.
Post-doctoral Fellow
Affective Neuroscience Lab
Dept. of Psychology, Harvard University
Phone: (617) 496-5222
E-
