Re: [Freesurfer] Parameterization Optseq

2013-07-05 Thread Laura Dekkers
Dear Doug, Some time ago we e-mailed about the optimazation of the timing ou our experimental design. Based on that conversation I have used the folling command line: --ntp 255 --tr 2.0 --tprescan 4.0 --psdwin 0.0 16.0 1.0 --ev Gain2 4.0 8.0 --ev Gain4 4.0 8.0 --ev Gain6 4.0 8.0 --ev Gain8 4.0

Re: [Freesurfer] Parameterization Optseq

2013-06-27 Thread Laura Dekkers
Dear Doug, Thank you for your explanations and suggestions. I tested the code under the new Optseq version and it seems to generate proper output now. Thanks a lot! Best regards, Laura 2013/6/21 Douglas Greve gr...@nmr.mgh.harvard.edu: On 6/20/13 5:55 AM, Laura Dekkers wrote: Dear Doug,

Re: [Freesurfer] Parameterization Optseq

2013-06-20 Thread Laura Dekkers
Dear Doug, Thank you for your e-mail. As you suggested, we changed tnullmax to 6 sec and run the following code in Optseq: --ntp 255 --tr 2.0 --tprescan 4.0 --psdwin 0.0 16.0 1.0 --ev Gain2 4.0 8.0 --ev Gain4 4.0 8.0 --ev Gain6 4.0 8.0 --ev Gain8 4.0 8.0 --ev Loss2 4.0 8.0 --ev Loss4 4.0 8.0 --ev

Re: [Freesurfer] Parameterization Optseq

2013-06-20 Thread Douglas Greve
On 6/20/13 5:55 AM, Laura Dekkers wrote: Dear Doug, Thank you for your e-mail. As you suggested, we changed tnullmax to 6 sec and run the following code in Optseq: --ntp 255 --tr 2.0 --tprescan 4.0 --psdwin 0.0 16.0 1.0 --ev Gain2 4.0 8.0 --ev Gain4 4.0 8.0 --ev Gain6 4.0 8.0 --ev Gain8 4.0

Re: [Freesurfer] Parameterization Optseq

2013-06-15 Thread Douglas Greve
Hi Donna, on the 2nd command line you need to change --tnullmax to 7 sec to be compatible with the 1st command line. I ran this and it works. doug On 6/11/13 8:45 AM, Laura Dekkers wrote: Dear Doug, Thanks you for your e-mail and sorry for the inconvenience. Here is the code again. In

Re: [Freesurfer] Parameterization Optseq

2013-06-11 Thread Laura Dekkers
Dear Doug, Thanks you for your e-mail and sorry for the inconvenience. Here is the code again. In this line of code we included the fixed duartion of the fix (1.0) in the event duration specification (summing to 5.0) and asked Optseq to insert null events of a minimum duration of 0.0 in 25% of

Re: [Freesurfer] Parameterization Optseq

2013-06-07 Thread Laura Dekkers
Dear Doug, Thank you for your e-mail. Please find attached our command line. We felt that the first two lines of code should essentially yield the same timing of events. In the first we included the fixed duration of the fix (1.0) in our event duration (4.0) and meant to ask for extra null

Re: [Freesurfer] Parameterization Optseq

2013-06-05 Thread Douglas N Greve
Hi Laura, what is your command line? doug On 06/04/2013 09:02 AM, Laura Dekkers wrote: Dear Dr Greve, Together with Dr Hilde Huizenga I am implementing an fMRI study in which we would like to optimize the design by using Optseq2. We have a few questions. Could you please help us out?

[Freesurfer] Parameterization Optseq

2013-06-04 Thread Laura Dekkers
Dear Dr Greve, Together with Dr Hilde Huizenga I am implementing an fMRI study in which we would like to optimize the design by using Optseq2. We have a few questions. Could you please help us out? Our task consists of 3 runs of 72 trails each, in which participants are presented with a fixation