I seriously doubt that 100ms is going to make much of a difference, but it's always good to make your stimulus timing as accurate as possible.
doug Jesse Friedman wrote: > Our group has been making paradigm files in which stimulus onset time is > always a multiple of the TR (e.g. 0;2;4;8;10;12;16) even though, as a > result of jitter in our stimulus presentation program, the actual stimulus > onset time may be off by a couple hundred milliseconds (e.g. > .08;2.13;4.21;7.82;10.02;12.30;15.86). I recently noticed this sentence in > the freesurfer wiki: "The onset time does not need to be a multiple of the > TR or linked in any way (e.g., the onset time could be something like > 11.340)." Would it be preferable if we were to alter our stimulus onset > column to reflect actual rather than intended stimulus onset time, or does > the relatively low temporal resolution make it a moot point? > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 In order to help us help you, please follow the steps in: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
