Hi,

I have 2 questions.

1) How do I calculate psd min, max, and dpsd.  Is there a formula for
calculating these values?  I have 4 kinds of stimuli, stim duration = 3s,
stim repetition = 25, TR =2 so:

optseq2 --ntp 180 --tr 2 --psdwin [?]  --ev A 3 25 --ev B 3 25 --ev C 3 25
--ev D 3 25 --o 4types --tsearch 10 --nkeep 4

What should my psd min, max, and dpsd be?


2) My task is history-dependent.  I would like to control the probabilities
that stimulus B follows A, C follows A, A follows D... Is there a way for me
to do that with optseq?

Thank you so much for your help.

Cheers,
Linh
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