On 8/1/13 8:03 PM, Claire Wilcox wrote:
Thanks much! Good to know:).
Can you clarify the second option? Do you mean just specify one event, and then change the name to one of four possibilities (low cs, low us, high cs, high us)? That prob wouldn't work as we would love to optimize contrast bw low and high cs/us.
Yes, this is what I mean. :(
We actually also want to keep the cs and us separate (and jitter time between) so that we can look at activation associated with cs separate from us, so sadly your first idea won't work either.
Sent from my iPhone
On Aug 1, 2013, at 5:35 PM, Douglas Greve greve@nmr.mgh.harvard.edu wrote:
Hi Claire, you can't do this type of design in optseq because optseq requires that there be no constraints of which stimulus can follow itself or another stimulus (obviously this does not work for your design). If you take a CS-US pair as a stimulus, then that should work. Also, you could spec just one condition and randomly recode stimuli as CS and US. It is not perfect, but you'd get the random timing, and it is probably good enough.
doug
On 8/1/13 6:44 PM, Claire Wilcox wrote:
hello, i'm struggling with how to specify a schedule and then ask optseq2 to identify an optimal timing schedule. specifically i have a conditioned cue and an unconditioned stimulus. the high threat CS always needs to follow with a high pain US and low threat CS with a low pain CS. how can i specify such a schedule in optseq2? i've been trying a number of combinations of below, but am failing miserably with lots of varying warnings and error messages and inability to read files or 'Bus error'
what should the --in input schedule file format look like? that might be the missing link .. although that's hard to say for sure.
many thanks, claire
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