Hi Carlotta,

> 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?

You should do this at whatever level is relevant to the question you
want to ask.

> 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?

I don't know - what do your variables represent?

Paul



On 27/03/2019, Carlotta Fabris <[log in to unmask]> wrote:
> 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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