[Homer-users] Baseline correction

[Meryem Ayse Yucel]

Hi Xin,

Not sure if you got an answer to this. The GLM functions and the block
average function in homer has a final step that does that. It looks
something like this:

... yavg(:,iConc,iCh,iCond) = yavg(:,iConc,iCh,iCond) -
ones(size(yavg,1),1)*mean(yavg(1:(-nPre),iConc,iCh,iCond),1);...

Hope this answers your question.

Meryem



> Dear all,
>
>
>
> I’m using Homer2 to analyze my fNIRS data from a task-related study.
> Just
> have a small question to ask, does homer2 deal with
> ‘baseline-correction’?
> I mean, subtracting the baseline response before the onset of stimuli and
> just showing an relative increase or decrease of activation to stimuli.
>
>
>
> Thanks so much.
>
>
>
> Best regards,
>
> Xin Zhou
>
>
>
> PhD Student,
>
> Medical Bionics Department,
>
> University of Melbourne, Australia
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