Re: [Freesurfer] dPSD and ev duration

2013-07-29 Thread Ella Hinton
On 7/28/13 4:05 PM, Ella Hinton wrote: Hi Quick question - why must the duration of the EVs be an integer multiple of the dPSD, which is also tied to the TR? I have event duration of 3

[Freesurfer] dPSD and ev duration

2013-07-28 Thread Ella Hinton
Hi Quick question - why must the duration of the EVs be an integer multiple of the dPSD, which is also tied to the TR? I have event duration of 3 seconds, but would like to reduce my TR from 3 down to 2.5, but I can't seem to input the correct numbers for optseq to help me. thanks in advance

[Freesurfer] Optseq - optimal parameters

2013-06-16 Thread Ella Hinton
Hi all, I have been advised to use optseq to aid my event related fMRI design, specifically to help calculate stimulus order and timing. I've read the help in some detail but am still a little unclear on some of the appropriate values to input and indeed what values I am aiming for in the outp