Dear SPMers,

I have noticed a strange thing in SPM (SPM12 r6225) “converting” time modulation to parametric modulation:

In spm_run_fmri_spec.m, lines 231-7:

%-Time Modulation

if cond.tmod > 0

            P(1).name = 'time';

            P(1).P    = U(j).ons * job.timing.RT / 60;

            P(1).h    = cond.tmod;

            q1        = 1;

end

Why are the onsets multiplied with TR and divided by 60?

Vale,

Auer, Tibor M.D. Ph.D.

MRC Cognition and Brain Sciences Unit
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