I don't necessarily think the exclude file is a better approach. What you are doing is probably fine. doug
On 5/1/15 12:12 PM, sha...@nmr.mgh.harvard.edu wrote: > Hi Doug, > The reason that we did not use that 'exclusion method' was that, we > were not sure if the effect of shock is limited to that specific TR. > Actually, like other stimuli/events, we expected shock effect to appear > slightly (1-2 TRs) later. In this case, don't you think using a > regressor is a safer approach? > To clarify, I am very open to your suggestions if you have a better > idea or if you still think that exclusion is a better approach. > > > >> That will do what you want if you expect the shock to have the same >> response to each application. Alternatively, you can set up a time point >> exclude file to exclude those time points. If you use this, then create >> the file by putting the time in seconds of the time points you want to >> exclude. >> doug >> >> On 5/1/15 11:45 AM, SHAHIN NASR wrote: >>> Hi Surfers >>> I want to remove the possible effects of a binary noise (electric >>> shock) from the evoked fMRI. To do so, I have generated a regressor >>> file in which all TRs in which electric shock has been applied are >>> marked as 1 and the rest of TRs are 0. I just want to be sure that, >>> this is all I need to do for the regressor! >>> A sample regressor file is attached. It has 98 rows corresponding >>> to 98 TRs that we have in the experiment! >>> >>> Regards >>> >>> -- >>> Shahin Nasr >>> >>> PhD in Cognitive Neuroscience >>> Martinos Imaging Center, MGH >>> Harvard Medical School >>> >> >> > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
