Dear Friends:
I have never used FSL to design correlation analysis. I really do not
know how to get .con and .mat files. Should I use FEAT or Glm_gui for
my analysis? It will be highly appreciated if you can give me a brief
instruction.
Best
Jiansong Xu, M.D., Ph.D.
Associate Research Scientist
Dept. of Psychiatry
Yale School of Medicine
Connecticut Mental Health Center, Room S-100
34 Park St.
New Haven, CT 06519
On Feb 4, 2008, at 9:43 AM, Gwenaëlle DOUAUD wrote:
> Exactly.
>
> Cheers,
> Gwenaelle
>
>
> --- Jiansong Xu <[log in to unmask]> a écrit :
>
>> Thanks. Did you mean to subtract mean RT from RT of
>> each subject by
>> saying "demeaned" RT?
>>
>>
>> Best
>>
>> Jiansong Xu, M.D., Ph.D.
>> Associate Research Scientist
>> Dept. of Psychiatry
>> Yale School of Medicine
>>
>> Connecticut Mental Health Center, Room S-100
>> 34 Park St.
>> New Haven, CT 06519
>>
>>
>>
>>
>>
>>
>>
>> On Feb 4, 2008, at 9:20 AM, Gwenaëlle DOUAUD wrote:
>>
>>> Hi,
>>>
>>> please have a look first at :
>>> http://www.fmrib.ox.ac.uk/fsl/randomise/index.html
>>> Basically, what you need to do is to put simply
>> the
>>> *demeaned* RT for your 16 subjects in a design
>> matrix
>>> desing.mat and look for positive (I guess?)
>>> correlation by setting up the contrast at 1 in
>> your
>>> design.con.
>>>
>>> Then all you need to do is run randomise on your
>>> *demeaned* tbss data (with the -D option):
>>> randomise -i all_fa_skeletonised -m
>>> mean_FA_skeleton_mask -o yourresults -d design.mat
>> -t
>>> design.con -D -n 5000 -V and for the correction
>> for
>>> multiple comparisons, please have a look at the
>> manual
>>> (-T or -c 2 for instance).
>>>
>>> Hope this helps,
>>> Gwenaelle
>>>
>>>
>>> --- Jiansong Xu <[log in to unmask]> a écrit :
>>>
>>>> Dear Friends:
>>>>
>>>> I'm trying TBSS. With the help of friends from
>> this
>>>> list, I have
>>>> reached after tbss_4_prestats successfully (It is
>> a
>>>> major achievement
>>>> for me!!). Now, I'm trying to assess the
>> correlation
>>>> between FA and
>>>> reaction time of each subject. Could any one give
>> me
>>>> some suggestions?
>>>> I have single group of 16 subjects.
>>>>
>>>>
>>>> Best
>>>>
>>>> Jiansong Xu, M.D., Ph.D.
>>>> Associate Research Scientist
>>>> Dept. of Psychiatry
>>>> Yale School of Medicine
>>>>
>>>> Connecticut Mental Health Center, Room S-100
>>>> 34 Park St.
>>>> New Haven, CT 06519
>>>>
>>>
>>>
>>>
>>>
>>>
>>
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>
>
>
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