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Dear Cornelius, what do you mean with this, in the example I was talking about a motor task "If there is language related activation in the data, one component (or more) will pick it up, along with a nice 30s-timecourse. So, if you see that (and FEAT or SPM won't give you anything reasonable), then it's most likely misspecified onset value" Thanks, Carolina 2011/5/9 Carolina Valencia <[log in to unmask]> > I did, for example a hand tapping task (30sec on 30sec off) during the > 3sec*105scans. > Another task of foot movement with the same settings. Other task of > listening a tale and so on. > > The onset time chosen in SPM was 10:20:100 with units scans > > I also use the 3 column file option with the txt file: > 23 30 1 > 83 30 1 > 143 30 1 > 203 30 1 > 263 30 1 > > and I run Melodic and the 6th component is similar to the spm result. (I > can not attach the images) > But I'm still want to run Melodic to run the other tasks and compare, > because sometimes is difficult to find the correct component that correspond > to the task in MELODIC > > Thanks, > > Best > > Carolina > > 2011/5/9 Cornelius Werner <[log in to unmask]> > >> Hi Carolina >> >> On Mon, May 9, 2011 at 4:00 PM, Carolina Valencia >> <[log in to unmask]> wrote: >> > Dear FSL users, >> > (...) >> > different motor and languages tasks examinated in independent cycles. >> >> What do you mean by this? How many separate tasks were involved? >> >> >> The steps in SPM were: >> > - Reorient the images according to the AC >> > - Realign the functional data >> > - Coregister the structural with the mean functional data as a reference >> > - Segmentation of the structural image >> > - normalise the realigned and the bias corrected data >> > - smoothing the normalise, realign functional data >> >> Did you make sure that onset times in your regressor file or .mat >> reflect that you discarded 5 timepoints? This is one of the most >> frequent mistakes (at least in my experience). >> >> > The steps in FSL FEAT were: >> > - Using BET in the structural Data for brain extraction >> > - In data tab choosing the functional data, using a high pass filter of >> 90 (calculated with cut off calc) and delete 5 scans >> > - Pre stats all defaults, bet extraction on, FWHM of 6 >> > - stats tab I use the model setup wizard with rArA with r of 30 seg and >> A of 30 seg >> > - Post stat I left defaults >> > - registration tab I used the result from Bet extraction in the main >> structural image >> >> If you have separate tasks (see above) then you shouldn't use the >> wizard. Actually, I recommend using the "full model setup" with a >> 3-column-file in all but the most simple settings. If you want to >> compare output from two packages, you certainly should use the same >> onset files. >> Another way to find out if there is meaningful signal in the data is >> running MELODIC. Here, you do not need to know about onset times. If >> there is language related activation in the data, one component (or >> more) will pick it up, along with a nice 30s-timecourse. So, if you >> see that (and FEAT or SPM won't give you anything reasonable), then >> it's most likely misspecified onset values. >> >> > >> > Thanks in advance, >> >> You're welcome >> Cornelius >> >> -- >> Dr. med. Cornelius J. Werner >> Department of Neurology >> RWTH Aachen University >> Pauwelsstr. 30 >> 52074 Aachen >> Germany >> > > > >