Hello list, I am new to optseq2 and I would need some help with it. I have a very long experiment (many stimuli) and on top of that I have a long TR (4s) because I collect 60 coronal slices covering all the brain. My stimuli are quite short 1.5s or 2.5s but according to optseq the stimuli duration should be a multiple of TR. Therefore, the min stim duration I can use is 4s. I thought of modelling stimuli as having a duration of 4sec (1.5 stim and a 2.5 artificial "null" event which is different than the null event optseq estimates).
I have a couple of questions: 1 I would like to know whether is better to include psdwin when I estimate a sequence or leave it out and use the TR value instead?
2 Also, would a psdwin of 20s be enough for a 4 sec stimulus?
3 My aim is to get a good sequence estimation with minimum time. I noticed that although I give a certain ntp, optseq estimates a sequence that may run longer.
4 Is the previous version of optseq still available? I only found optseq2 on your website. Thanks a lot for your help. Tamara