Dear Alle,
>Dear Maria,
>Maria Densmore wrote:
>
>
>>Hello ,
>>Thanks for your feedback.
>>I still need clarification of my two concerns.
>>1) I don't quite understand how to set my design matrix since there is no
>> baseline condition to subtract the task from. What I do have is, one task
>> (eyes closed)that continues throughout the entire 110 volumes acquired.
>>
>>
>The design matrix consisted, as far as the paper describes it, of the 3
>regional mean time series (made by the 12mm spheres round the peaks of
>activity). The degree of freedom was computed as n-3 so I guess there
>was no intercept (ie the data should already have zero mean).
>
>
Well, if I'm right (IF) the correlation analysis was performed on
residuals .. and thus assuming mean 0
>As said this is quite a dodgy way of estimating functional connectivity
>
>
... agree
Best
Cyril
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