Hello all,

A question regarding the usage of Optseq2

I have this command line

optseq2 --ntp 200 --tr 2.5 --psdwin 0 15 2.5 --ev ev20 2.5 20 --ev ev40 2.5 20 --ev ev60 2.5 20 --tnullmin 5 --tnullmax 7.5 --nkeep 1 --o OptSeq_TRIALS/3_null9_6 --nsearch 10000

Now the efficiency tha I get is around 0.5. How I can tell this is a good or bad efficiency ? Is there a comparable level?

Also if I would like to test for the first order effect of using a parametric modulation, can I test this using OptSeq2?

Lastly, if I would like to test the efficiency of a contrast, say ev60 > ev20, how I do this ?

Thanks

Adnan