Dear all,
We are trying to reproduce old results obtained with SPM8 version 3042. They are quite different from new results obtained with recent versions of SPM8 such as the latest version 6313 or previous version 5236 (or SPM12 for that matter). We have identified the cause of this discrepancy. File spm_gt_ons.m seems to have been changed around line 238 from:
% create stimulus functions (32 bin offset)
%======================================================================
ton = round(ons*TR/dt) + 32; % onsets
tof = round(dur*TR/dt) + ton + 1; % offset
to:
% create stimulus functions (32 bin offset)
%======================================================================
ton = round(ons*TR/dt) + 33; % onsets
tof = round(dur*TR/dt) + ton + 1; % offset
As you can see both variables "ton" and "tof" have been incremented.
Could you please confirm that spm_gt_ons.m has indeed been changed as shown above between versions 3042 and 5236? If so, could you please comment on the reason for this change and the resulting discrepancy in final results?
Best,
Dimitri
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