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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