Dear Tyler,
It's quite difficult to provide you with an answer without knowing
exactly how you run the two analyses in the two SPM versions but the one
thing I can think of is the change of the default for the microtime
onset t0 from 1 in SPM8 to 8 in SPM12. Are both analyses relying on SPM
default value or is it encoded in the script/batch you are using?
Best regards,
Guillaume.
On 19/02/18 02:07, Tyler Hein wrote:
> For spm_orth.m, there is a new option in spm12 to include normalisation
> in serial orthogonalisation, and the code that is executed for this
> condition is identical to what was executed in spm8 under the default
> condition. In spm12, the default condition now has different code. In
> the instructions we give students, it does not indicate changing the
> normalisation parameter from the default. However, I think this script
> is executed for both canonical and FIR basis functions, so I'm not sure
> that this would be the source of the differences in findings, either.
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
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