Hi,


THank you for your response but I'm afraid I was not very clear in my question.
I know what flags to use in order to specify min/max lags in 3dDeconvolve.

The problem is that I do not have data for min and max lags.

Let's say :

======TR 1 ================|| =========== TR 2 ========= || ============== TR 3 =========

1 2 3 4 5 6 7 8 9 10 11 12 || 1 2 3 4 5 6 7 8 9 10 11 12 || 1 2 3 4 5 6 7 8 9 10 11 12 etc

......1.........................1........................................... 1.............




------------------------------------------------

TR=12 seconds;


TR 1:

second 1: one brain volume is acquired in less than one second;
second 2-3: no brain volume is acquired;
second 4: event A is ON after 4 seconds from the beginning of the TR 1.
second 5-12: no brain volume is acquired;




TR2 :

second 1: one brain volume is acquired in less than one second;
second 2: event A is ON after 2 seconds from the beginning of the TR 2.
second 3-12: no brain volume is acquired;



TR3 :

second 1: one brain volume is acquired in less than one second;
second 2-8: no brain volume is acquired;
second 9: event A is ON after 9 seconds from the beginning of the TR 3.
second 10-12: no brain volume is acquired;

etc.

THe question is how can I specify a min and a max lag since I do not have data for those lags:

e.g

-stim_minlag 1 1 -stim_maxlag 1 6

in TR1 I do not have any data for min lag 1 or 2 or 3 etc. I have data only for lag 9 when the brain volume 2 was acquired ;

in TR 2 I have data only for lag 11 when the brain volume 3 was acquired ;


========================
So I was wondering if 3dDeconvolve is the best approach for this kind of experimental design .

Thank you for your help;

teodora