Hi Andy,
the temp. derivative ' corrects ' for small timing differences between
model function(s) and your data. This delay may caused by inapr.
stimulus onsets but also by differences between the modelled hrf
and the real hrf. Therefore, I would use it even if the onsets are well
well known.
Best wishes,
Lukas
Lukas Scheef, MD, MSc
MR-Tomography
Department of Radiology
University of Bonn
Sigmund-Freud-Straße 25
D-53105 Bonn
Fax: +49-228-287-5598
Phone:+49-228-287-4496
E-mail: [log in to unmask]
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