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Thank you Paul!

I was interested in calculating the correlation of my DVs with the peaks of
the third level analyses I did, so I won't have the values for each
individual, but for the different groups. Should I use the second level
analyses to calculate the scalar values for each subject?

Another thing I wanted to ask is, I have 250 DVs for each subject, should I
do a mean of all of them to find the correlation of these with the scalar
values?

Thanks,
Carlotta.


Il Mer 27 Mar 2019, 15:59 paul mccarthy <[log in to unmask]> ha
scritto:

> Hi Carlotta,
>
> There are many different ways to create ROI masks, such as manually
> drawing, using a discrete or probabilistic atlas, or defining a
> spheres areound areas of peak activation. You need to decide which
> areas of the brain you are interested in, and then create a binary
> mask image with 1s in those areas, and 0s everywhere else.
>
> After you've calculated a scalar value, derived from COPE values
> within your region, for each individual in your study, you can then
> correlate them with your other measures as you were already trying to
> do - using MATLAB, SPSS, or similar.
>
> Cheers,
>
> Paul
>
> On 27/03/2019, Carlotta Fabris <[log in to unmask]> wrote:
> > Hi Paul!
> >
> > I am sorry to bother you, but could you explain me something more about
> what
> > should I do to create the mask and also what I should do after the
> > calculation of the regional metrics?
> >
> > Thank you a lot,
> > Carlotta.
> >
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