Hello everybody.
I was playing around with the spm_hrf.m function and plotted output of the
function.
RT = 1;
[hrf] = spm_hrf(RT);
When I take the default settings for p ( i.e. p = [6 16 1 1 6 0 32];
) and plot the output, then the peak of the curve is at 5 s.
I thought the peak should be at 6 second, because of the default setting
of p(1) ( delay of response (relative to onset) ).
Then I tried to change the values for the delay (p(1)) to 3, 4, 5, 7 and
8 seconds.
Everytime I plot the output, I get a delay 1 second less then p(1) is.
Can anyone tell me, why this is the case?
Thanks.
Greetings
Walter
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