Hi Ankit,
> I am trying to run a TBSS analysis wherein I am trying to
> find correlation between a group of subjects and some
> continuous variable. So, I just wanted to know as to what
> was the correct way of doing it.
>
> What I have done so far
>
> I have two group of subjects (I have merged them into one
> for finding the correlation between the data and continuous
> variable and called them group1)
> EV2 is the continuous variable of interest. I have demeaned
> it and I am using the following design
>
>
> Group1 EV1 (data)
> EV2(variable)
> 1
> 1
> x
> 1
> 1
> y
> 1
> 1
> z
> .
> .
>
> .
> .
> .
>
> .
> .
> .
>
> . and so
> on.
>
>
> Contrast
>
> A>B
> 1 0
> B>A
> -1 0
>
> Is this the correct way of proceeding. Kindly advise
Not exactly. If your variable of interest is in EV2, then your contrast should be:
0 1
0 -1
The group information is also not needed here.
Cheers,
Gwenaelle
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Gwenaëlle Douaud, PhD
FMRIB Centre, University of Oxford
John Radcliffe Hospital, Headington OX3 9DU Oxford UK
Tel: +44 (0) 1865 222 523 Fax: +44 (0) 1865 222 717
www.fmrib.ox.ac.uk/~douaud
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