[Homer-users] Block averaging

[Eugenio Parise]

Hi Meryem,

I have found the solution, it is (like you say) because of the stimulus vector.
Thank you very much.

Eugenio

Il giorno 12/feb/2013, alle ore 16.52, Meryem Ayse Yucel ha scritto:

> Hi Eugenio,
> 
> What is your filtering range?
> Also your stimulus vector s should only have 1's at the onset of the
> stimulus, not throughout it, can you check that?
> 
> Meryem
> 
> 
> 
>> Dear Homer2 community,
>> 
>> I am new to Homer and relatively new to NIRS.
>> 
>> I do not understand the following. I am able to process my file with
>> Homer2 (v 1.3). What I get (concentration of Oxy) is displayed in the
>> attached figures (Time course.eps and Time course + Stim.eps, this second
>> plot just showing the stimuli onset and offset). What I get looks good to
>> me and it is congruent to what I was getting with other softwares. However
>> when I look at the block average (Average.eps) I really do not understand
>> what is going on. Namely I do not see how is it possible to get such an
>> average curve from that time course. To me that does not look as an
>> average coming from my concentration data.
>> Can you please help me to understand? What does Homer2 does when computing
>> and/or plotting the block average?
>> 
>> Thank you!
>> Eugenio
>> 
>> Eugenio Parise, Ph.D.
>> Cognitive Development Center - Central European University
>> Hattyú utca 14, 1015 Budapest, Hungary
>> Phone: +36 1 88 333 41
>> Mobile: +36 70 225 5020
>> Fax:     +36 1 88 333 48
>> http://web.me.com/babakutato/babakutato/Munkatársak/Munkatársak.html
>> http://www.ceu.hu/profiles/research-fellow/eugenio_parise
>> 
>> 
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Eugenio Parise, Ph.D.
Cognitive Development Center - Central European University
Hattyú utca 14, 1015 Budapest, Hungary
Phone: +36 1 88 333 41
Mobile: +36 70 225 5020
Fax:     +36 1 88 333 48
http://web.me.com/babakutato/babakutato/Munkatársak/Munkatársak.html
http://www.ceu.hu/profiles/research-fellow/eugenio_parise



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